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Robustify refcounting.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160126045947.GA40151@ast-mbp.thefacebook.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Dan reported:
1229 if (ctx->task == TASK_TOMBSTONE ||
1230 !atomic_inc_not_zero(&ctx->refcount)) {
1231 raw_spin_unlock(&ctx->lock);
1232 ctx = NULL;
^^^^^^^^^^
ctx is NULL.
1233 }
1234
1235 WARN_ON_ONCE(ctx->task != task);
^^^^^^^^^^^^^^^^^
The patch adds a NULL dereference.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: 63b6da39bb38 ("perf: Fix perf_event_exit_task() race")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Get rid of the 'onln' obfuscation.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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When calling intel_alt_er() with .idx != EXTRA_REG_RSP_* we will not
initialize alt_idx and then use this uninitialized value to index an
array.
When that is not fatal, it can result in an infinite loop in its
caller __intel_shared_reg_get_constraints(), with IRQs disabled.
Alternative error modes are random memory corruption due to the
cpuc->shared_regs->regs[] array overrun, which manifest in either
get_constraints or put_constraints doing weird stuff.
Only took 6 hours of painful debugging to find this. Neither GCC nor
Smatch warnings flagged this bug.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: ae3f011fc251 ("perf/x86/intel: Fix SLM MSR_OFFCORE_RSP1 valid_mask")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The test for the qemu q35 south bridge added by commit
"39bfcd52 drm/i915: more virtual south bridge detection"
also matches on real hardware. Having the check for
virtual systems last in the list is not enough to avoid
that ...
Refine the check by additionally verifying the pci
subsystem id to see whenever it *really* is qemu.
[ v2: fix subvendor tyops ]
Reported-and-tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Bruno Wolff III <bruno@wolff.to>
Cc: drm-intel-fixes@lists.freedesktop.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453719748-10944-1-git-send-email-kraxel@redhat.com
(cherry picked from commit 1e859111c128265f8d62b39ff322e42b1ddb5a20)
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Commit 5bab6f60cb4d ("drm/i915: Serialise updates to GGTT with access
through GGTT on Braswell") depended upon a working stop_machine() and
so forced the selection of STOP_MACHINE. However, commit 86fffe4a61dd
("kernel: remove stop_machine() Kconfig dependency") removed the option
STOP_MACHINE from init/Kconfig and ensured that stop_machine()
universally works. Due to the order in which the patches were applied,
removing the select from DRM_I915 got lost during merging.
Remove the now obsolete select statement.
Signed-off-by: Andreas Ziegler <andreas.ziegler@fau.de>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1453722079-2604-1-git-send-email-andreas.ziegler@fau.de
Cc: drm-intel-fixes@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 21fabbebff0e17c7698ed399cae23958c214cc82)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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In this atomic age, we can't trust the plane->fb pointer anymore.
It might get update too late. Instead we are supposed to use the
plane_state->fb pointer instead. Let's do that in
intel_plane_obj_offset() and avoid problems from dereferencing the
potentially stale plane->fb pointer.
Paulo found this with 'kms_frontbuffer_tracking --show-hidden --run-subtest nop-1p-rte'
but it can be reproduced with just plain old kms_setplane.
I was too lazy to bisect this, so not sure exactly when it broke. The
most obvious candidate
commit ce7f17285639 ("drm/i915: Fix i915_ggtt_view_equal to handle rotation correctly")
was actually still fine, so it must have broken some time after that.
Here's the resulting fireworks:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffffa02d2d9a>] intel_fill_fb_ggtt_view+0x1b/0x15a [i915]
PGD 8a5f6067 PUD 8a5f5067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm intel_gtt agpgart netconsole mousedev hid_generic psmouse usbhid atkbd libps2 coretemp hwmon efi_pstore intel_rapl iosf_mbi x86_pkg_temp_thermal efivars pcspkr e1000e sdhci_pci ptp pps_core sdhci i2c_i801 mmc_core i2c_hid hid i8042 serio evdev sch_fq_codel ip_tables x_tables ipv6 autofs4
CPU: 1 PID: 260 Comm: kms_plane Not tainted 4.4.0-skl+ #171
Hardware name: Intel Corporation Skylake Client platform/Skylake Y LPDDR3 RVP3, BIOS SKLSE2R1.R00.B104.B00.1511030553 11/03/2015
task: ffff88008bde2d80 ti: ffff88008a6ec000 task.ti: ffff88008a6ec000
RIP: 0010:[<ffffffffa02d2d9a>] [<ffffffffa02d2d9a>] intel_fill_fb_ggtt_view+0x1b/0x15a [i915]
RSP: 0018:ffff88008a6efa10 EFLAGS: 00010086
RAX: 0000000000000001 RBX: ffff8801674f4240 RCX: 0000000000000014
RDX: ffff88008a7440c0 RSI: 0000000000000000 RDI: ffff88008a6efa40
RBP: ffff88008a6efa30 R08: ffff88008bde3598 R09: 0000000000000001
R10: ffff88008b782000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88008a7440c0 R14: 0000000000000000 R15: ffff88008a7449c0
FS: 00007fa0c07a28c0(0000) GS:ffff88016ec40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000008a6ff000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffff8801674f4240 0000000000000000 ffff88008a7440c0 0000000000000000
ffff88008a6efaa0 ffffffffa02daf25 ffffffff814ec80e 0000000000070298
ffff8800850d0000 ffff88008a6efaa0 ffffffffa02c49c2 0000000000000002
Call Trace:
[<ffffffffa02daf25>] intel_plane_obj_offset+0x2d/0xa9 [i915]
[<ffffffff814ec80e>] ? _raw_spin_unlock_irqrestore+0x4b/0x60
[<ffffffffa02c49c2>] ? gen9_write32+0x2e8/0x3b8 [i915]
[<ffffffffa02eecfc>] skl_update_plane+0x203/0x4c5 [i915]
[<ffffffffa02ca1ab>] intel_plane_atomic_update+0x53/0x6a [i915]
[<ffffffffa02494a4>] drm_atomic_helper_commit_planes_on_crtc+0x142/0x1d5 [drm_kms_helper]
[<ffffffffa02de44b>] intel_atomic_commit+0x1262/0x1350 [i915]
[<ffffffffa024a0ee>] ? __drm_atomic_helper_crtc_duplicate_state+0x2f/0x41 [drm_kms_helper]
[<ffffffffa01ef089>] ? drm_atomic_check_only+0x3e3/0x552 [drm]
[<ffffffffa01ef245>] drm_atomic_commit+0x4d/0x52 [drm]
[<ffffffffa024996b>] drm_atomic_helper_update_plane+0xcb/0x118 [drm_kms_helper]
[<ffffffffa01e42e8>] __setplane_internal+0x1c8/0x224 [drm]
[<ffffffffa01e477f>] drm_mode_setplane+0x14e/0x172 [drm]
[<ffffffffa01d8117>] drm_ioctl+0x265/0x3ad [drm]
[<ffffffffa01e4631>] ? drm_mode_cursor_common+0x158/0x158 [drm]
[<ffffffff810d00ab>] ? current_kernel_time64+0x5e/0x98
[<ffffffff810a76ea>] ? trace_hardirqs_on_caller+0x17a/0x196
[<ffffffff8119880f>] do_vfs_ioctl+0x42b/0x4ea
[<ffffffff811a2b72>] ? __fget_light+0x4d/0x71
[<ffffffff81198911>] SyS_ioctl+0x43/0x61
[<ffffffff814ed057>] entry_SYSCALL_64_fastpath+0x12/0x6f
Cc: drm-intel-fixes@lists.freedesktop.org
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Testcase: igt/kms_plane
Reported-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453220597-28973-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit e794129444aba459e9bedf5080bfb4605f933c32)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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On SKL+ plane scaling is mutually exclusive with color keying. The code
check for this, but during some refactoring the code got changed to
also reject primary plane windowing when color keying is used. There is
no such restriction in the hardware, so restore the original logic.
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 061e4b8d650a ("drm/i915: clean up atomic plane check functions, v2.")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452883613-28549-1-git-send-email-ville.syrjala@linux.intel.com
Cc: stable@vger.kernel.org
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
(cherry picked from commit 693bdc28a733dba68b86af295e7509812fec35d9)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Per DP spec, the source device should fall back to 18 bpp, VESA range
RGB when the sink capability is unknown. Fix the color depth
clamping. 18 bpp color depth should ensure full color range in automatic
mode.
The clamping has been HDMI specific since its introduction in
commit 996a2239f93b03c5972923f04b097f65565c5bed
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri Apr 19 11:24:34 2013 +0200
drm/i915: Disable high-bpc on pre-1.4 EDID screens
Cc: stable@vger.kernel.org
Reported-and-tested-by: Dihan Wickremasuriya <nayomal@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=105331
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452695720-7076-1-git-send-email-jani.nikula@intel.com
(cherry picked from commit 013dd9e038723bbd2aa67be51847384b75be8253)
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We need to set the DC FLUSH PIPE_CONTROL bit on Gen7+ to guarantee
that writes performed via the HDC are visible in memory. Fixes an
intermittent failure in a Piglit test that writes to a BO from a
shader using GL atomic counters (implemented as HDC untyped atomics)
and then expects the memory to read back the same value after mapping
it on the CPU.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91298
Tested-by: Mark Janes <mark.a.janes@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452740379-3194-1-git-send-email-currojerez@riseup.net
(cherry picked from commit 965fd602a6436f689f4f2fe40a6789582778ccd5)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Previously, speakup would always read the non-scrolled part of the VT,
even when the VT is scrolled back with shift-page. This patch makes
vt.c export screen_pos so that speakup can use it to properly access
the content of the scrolled-back VT.
This was tested with both vgacon and fbcon.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit f79b0d9c223c ("staging: speakup: Fixed warning <linux/serial.h>
instead of <asm/serial.h>") broke the port information in the speakup
driver: SERIAL_PORT_DFNS only gets defined if asm/serial.h is included,
and no other header includes asm/serial.h.
We here make sure serialio.c does get the arch-specific definition of
SERIAL_PORT_DFNS from asm/serial.h, if any.
Along the way, this makes sure that we do have information for the
requested serial port number (index)
Fixes: f79b0d9c223c ("staging: speakup: Fixed warning <linux/serial.h> instead of <asm/serial.h>")
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: stable <stable@vger.kernel.org> # 3.18
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Andrew Lunn says:
====================
Part 2 of v4.5-rc1 phylib regression
White list PHY compatible values which indicate PHYs. Issue a warning
when one is encountered.
Update the documentation to make it clear what is expected in the
compatible string.
v2:
Fix Grammar, reword changelog, add Tested-by and Acked-by.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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PHY devices may only list compatibility with clause 22, 45, and if
they need to be more specific, their PHY identifier values. No other
compatible strings are allowed. Make this clear in the documentation,
and remove examples where make/model compatible strings are listed.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some phy nodes list a compatible value indicating the PHY make/model.
This is never used to match the device to the driver. However it does
confuse the code to separate a PHY from a generic MDIO device like a
switch. Generic MDIO devices must have a compatible value, PHYs can
list clause 22 or 45, but nothing else.
Issue a warning if we find a compatible value known on the whitelist,
and say it is a PHY.
Fixes: a9049e0c513c ("mdio: Add support for mdio drivers.")
Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Reported-by: Olof Johansson <olof@lixom.net>
Tested-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Woojung Huh says:
====================
lan78xx: update and fixes
lan78xx: change to use updated phy-ignore-interrupts
lan78xx: Add to handle mux control per chip id
lan78xx: throttle TX path at slower than SuperSpeed USB
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Throttle TX path only at slower than SuperSpeed USB.
SuperSpeed USB has enough bandwidth to maintain GigE.
Signed-off-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Depends on chip, some EEPROM pins are muxed with LED function.
Disable & restore LED function to access EEPROM.
Signed-off-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Update lan78xx to use patch of commit 4f2aaf7dd95b
("Merge branch 'fix-phy-ignore-interrupts'").
Signed-off-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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With some combinations of user provided flags in netlink command,
it is possible to call tcp_get_info() with a buffer that is not 8-bytes
aligned.
It does matter on some arches, so we need to use put_unaligned() to
store the u64 fields.
Current iproute2 package does not trigger this particular issue.
Fixes: 0df48c26d841 ("tcp: add tcpi_bytes_acked to tcp_info")
Fixes: 977cb0ecf82e ("tcp: add pacing_rate information into tcp_info")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Vendor ID 0x10de0083 is used by a yet-to-be-named GPU chip.
This chip also has the 2-ch audio swapping bug, so patch_nvhdmi is
appropriate here.
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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This reverts commit ebd43516d3879f882a403836bba8bc5791f26a28.
We should not be sleeping inside spin_lock.
Fixes: ebd43516d387 ("Staging: panel: usleep_range is preferred over udelay")
Cc: Sirnam Swetha <theonly.ultimate@gmail.com>
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Reported-by: Huang, Ying <ying.huang@intel.com>
Tested-by: Huang, Ying <ying.huang@intel.com>
Cc: stable <stable@vger.kernel.org> # 4.4
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull minor tracing fixes from Steven Rostedt:
"This includes three minor fixes, mostly due to cut-and-paste issues.
The first is a cut and paste issue that changed the amount of stack to
skip when tracing a stack dump from 0 to 6, which basically made the
stack disappear for small stack traces.
The second fix is just removing an unused field in a struct that is no
longer used, and currently just wastes space.
The third is another cut-and-paste fix that had a tracepoint recording
the wrong field (it was recording the previous field a second time)"
* tag 'trace-v4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/dma-buf/fence: Fix timeline str value on fence_annotate_wait_on
ftrace: Remove unused nr_trampolines var
tracing: Fix stacktrace skip depth in trace_buffer_unlock_commit_regs()
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When switchdev drivers process FDB notifications from the underlying
device they resolve the netdev to which the entry points to and notify
the bridge using the switchdev notifier.
However, since the RTNL mutex is not held there is nothing preventing
the netdev from disappearing in the middle, which will cause
br_switchdev_event() to dereference a non-existing netdev.
Make switchdev drivers hold the lock at the beginning of the
notification processing session and release it once it ends, after
notifying the bridge.
Also, remove switchdev_mutex and fdb_lock, as they are no longer needed
when RTNL mutex is held.
Fixes: 03bf0c281234 ("switchdev: introduce switchdev notifier")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Trying to batch Tx response events results in poor performance because
this delays freeing the transmitted skbs.
Instead use the standard RING_FINAL_CHECK_FOR_RESPONSES() macro to be
notified once the next Tx response is placed on the ring.
Signed-off-by: Malcolm Crossley <malcolm.crossley@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The code in txq_put_data() would use txq->tx_curr_desc to index the
tso_hdrs/tso_hdrs_dma buffers, for less than 8 bytes unaligned
fragments, which is already moved to the next descriptor at the
beginning of the function.
If that fragment was the last of the the skb, the next skb would use
that same space to place the ip headers, overwritting that small
fragment data.
Fixes: 91986fd3d335 (net: mv643xx_eth: Ensure proper data alignment in TSO TX path)
Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Reviewed-by: Philipp Kirchhofer <philipp@familie-kirchhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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of_phy_find_device() is used to find the phy device associated with a
device node. It is expected the node is for a PHY device, but in fact
it could of been probed as a generic MDIO device. Ensure the device is
a PHY before returning it.
Fixes: a9049e0c513c ("mdio: Add support for mdio drivers.")
Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Here's a first set of fixes for the 4.5-rc cycle:
* make regulatory messages much less verbose by default
* various remain-on-channel fixes
* scheduled scanning fixes with hardware restart
* a PS-Poll handling fix; was broken just recently
* bugfix to avoid buffering non-bufferable MMPDUs
* world regulatory domain data fix
* a fix for scanning causing other work to get stuck
* hwsim: revert an older problematic patch that caused some
userspace tools to have issues - not that big a deal as
it's a debug only driver though
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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https://github.com/markyzq/kernel-drm-rockchip into drm-fixes
Here are some fixes for drm/rockchip, these fixes base on drm-next.
These fixes works on my popmetal(rk3288) board.
About patch: drm/atomic-helper: Export framebuffer_changed()
Daniel Vetter ack for merging it through rockchip git trees, so framebuffer_changed() can be reused by drm/rockchip.
All others looks good, so I'd like you can land them.
* 'drm-rockchip-next-fixes-2016-01-22' of https://github.com/markyzq/kernel-drm-rockchip:
drm/rockchip: respect CONFIG_DRM_FBDEV_EMULATION
drm/rockchip: fix wrong pitch/size using on gem
drm/rockchip: explain why we can't wait_for_vblanks
drm/rockchip: don't wait for vblank if fb hasn't changed
drm/atomic-helper: Export framebuffer_changed()
drm/rockchip/dsi: fix handling mipi_dsi_pixel_format_to_bpp result
drm/rockchip: vop: fix mask when updating interrupts
drm/rockchip: cleanup unnecessary export symbol
drm/rockchip: Don't build rockchip_drm_vop as modules
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Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>.
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Not every arch has io memory.
So, unbreak the build by fixing the dependencies.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This commit fixes a corner case in tcp_mark_head_lost() which was
causing the WARN_ON(len > skb->len) in tcp_fragment() to fire.
tcp_mark_head_lost() was assuming that if a packet has
tcp_skb_pcount(skb) of N, then it's safe to fragment off a prefix of
M*mss bytes, for any M < N. But with the tricky way TCP pcounts are
maintained, this is not always true.
For example, suppose the sender sends 4 1-byte packets and have the
last 3 packet sacked. It will merge the last 3 packets in the write
queue into an skb with pcount = 3 and len = 3 bytes. If another
recovery happens after a sack reneging event, tcp_mark_head_lost()
may attempt to split the skb assuming it has more than 2*MSS bytes.
This sounds very counterintuitive, but as the commit description for
the related commit c0638c247f55 ("tcp: don't fragment SACKed skbs in
tcp_mark_head_lost()") notes, this is because tcp_shifted_skb()
coalesces adjacent regions of SACKed skbs, and when doing this it
preserves the sum of their packet counts in order to reflect the
real-world dynamics on the wire. The c0638c247f55 commit tried to
avoid problems by not fragmenting SACKed skbs, since SACKed skbs are
where the non-proportionality between pcount and skb->len/mss is known
to be possible. However, that commit did not handle the case where
during a reneging event one of these weird SACKed skbs becomes an
un-SACKed skb, which tcp_mark_head_lost() can then try to fragment.
The fix is to simply mark the entire skb lost when this happens.
This makes the recovery slightly more aggressive in such corner
cases before we detect reordering. But once we detect reordering
this code path is by-passed because FACK is disabled.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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drm-fixes
This pull request just includes the !CONFIG_PM_SLEEP build fix for
vc4.
* tag 'drm-vc4-fixes-2015-01-19' of http://github.com/anholt/linux:
drm/vc4: Remove broken attempt at GPU reset using genpd.
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into drm-fixes
A bunch of etnaviv fixes for 4.5-rc. Most of them are fixing
things in code paths that will only be hit if something goes
wrong, which have been unearthed by more extensive testing.
The only thing that doesn't really qualify as fixes is an UAPI
extension that userspace wants to rely on being present, so
I want to fast-track this into 4.5 before etnaviv ends up in a
released kernel.
* 'drm-etnaviv-fixes' of git://git.pengutronix.de/git/lst/linux:
drm/etnaviv: call correct function when trying to vmap a DMABUF
drm/etnaviv: rename etnaviv_gem_vaddr to etnaviv_gem_vmap
drm/etnaviv: fix get pages error path in etnaviv_gem_vaddr
drm/etnaviv: fix memory leak in IOMMU init path
drm/etnaviv: add further minor features and varyings count
drm/etnaviv: add helper for comparing model/revision IDs
drm/etnaviv: add helper to extract bitfields
drm/etnaviv: use defined constants for the chip model
drm/etnaviv: update common and state_hi xml.h files
drm/etnaviv: ignore VG GPUs with FE2.0
drm/etnaviv: fix failure path if model is zero
drm/etnaviv: hold object lock while getting pages for coredump
drm/etnaviv: remove owner assignment from platform_driver
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Later parts of the stack (including fragmentation) expect that there is
never a socket attached to frag in a frag_list, however this invariant
was not enforced on all defrag paths. This could lead to the
BUG_ON(skb->sk) during ip_do_fragment(), as per the call stack at the
end of this commit message.
While the call could be added to openvswitch to fix this particular
error, the head and tail of the frags list are already orphaned
indirectly inside ip_defrag(), so it seems like the remaining fragments
should all be orphaned in all circumstances.
kernel BUG at net/ipv4/ip_output.c:586!
[...]
Call Trace:
<IRQ>
[<ffffffffa0205270>] ? do_output.isra.29+0x1b0/0x1b0 [openvswitch]
[<ffffffffa02167a7>] ovs_fragment+0xcc/0x214 [openvswitch]
[<ffffffff81667830>] ? dst_discard_out+0x20/0x20
[<ffffffff81667810>] ? dst_ifdown+0x80/0x80
[<ffffffffa0212072>] ? find_bucket.isra.2+0x62/0x70 [openvswitch]
[<ffffffff810e0ba5>] ? mod_timer_pending+0x65/0x210
[<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90
[<ffffffffa03205a2>] ? nf_conntrack_in+0x252/0x500 [nf_conntrack]
[<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70
[<ffffffffa02051a3>] do_output.isra.29+0xe3/0x1b0 [openvswitch]
[<ffffffffa0206411>] do_execute_actions+0xe11/0x11f0 [openvswitch]
[<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70
[<ffffffffa0206822>] ovs_execute_actions+0x32/0xd0 [openvswitch]
[<ffffffffa020b505>] ovs_dp_process_packet+0x85/0x140 [openvswitch]
[<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70
[<ffffffffa02068a2>] ovs_execute_actions+0xb2/0xd0 [openvswitch]
[<ffffffffa020b505>] ovs_dp_process_packet+0x85/0x140 [openvswitch]
[<ffffffffa0215019>] ? ovs_ct_get_labels+0x49/0x80 [openvswitch]
[<ffffffffa0213a1d>] ovs_vport_receive+0x5d/0xa0 [openvswitch]
[<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90
[<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90
[<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90
[<ffffffffa0214895>] ? internal_dev_xmit+0x5/0x140 [openvswitch]
[<ffffffffa02148fc>] internal_dev_xmit+0x6c/0x140 [openvswitch]
[<ffffffffa0214895>] ? internal_dev_xmit+0x5/0x140 [openvswitch]
[<ffffffff81660299>] dev_hard_start_xmit+0x2b9/0x5e0
[<ffffffff8165fc21>] ? netif_skb_features+0xd1/0x1f0
[<ffffffff81660f20>] __dev_queue_xmit+0x800/0x930
[<ffffffff81660770>] ? __dev_queue_xmit+0x50/0x930
[<ffffffff810b53f1>] ? mark_held_locks+0x71/0x90
[<ffffffff81669876>] ? neigh_resolve_output+0x106/0x220
[<ffffffff81661060>] dev_queue_xmit+0x10/0x20
[<ffffffff816698e8>] neigh_resolve_output+0x178/0x220
[<ffffffff816a8e6f>] ? ip_finish_output2+0x1ff/0x590
[<ffffffff816a8e6f>] ip_finish_output2+0x1ff/0x590
[<ffffffff816a8cee>] ? ip_finish_output2+0x7e/0x590
[<ffffffff816a9a31>] ip_do_fragment+0x831/0x8a0
[<ffffffff816a8c70>] ? ip_copy_metadata+0x1b0/0x1b0
[<ffffffff816a9ae3>] ip_fragment.constprop.49+0x43/0x80
[<ffffffff816a9c9c>] ip_finish_output+0x17c/0x340
[<ffffffff8169a6f4>] ? nf_hook_slow+0xe4/0x190
[<ffffffff816ab4c0>] ip_output+0x70/0x110
[<ffffffff816a9b20>] ? ip_fragment.constprop.49+0x80/0x80
[<ffffffff816aa9f9>] ip_local_out+0x39/0x70
[<ffffffff816abf89>] ip_send_skb+0x19/0x40
[<ffffffff816abfe3>] ip_push_pending_frames+0x33/0x40
[<ffffffff816df21a>] icmp_push_reply+0xea/0x120
[<ffffffff816df93d>] icmp_reply.constprop.23+0x1ed/0x230
[<ffffffff816df9ce>] icmp_echo.part.21+0x4e/0x50
[<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70
[<ffffffff810d5f9e>] ? rcu_read_lock_held+0x5e/0x70
[<ffffffff816dfa06>] icmp_echo+0x36/0x70
[<ffffffff816e0d11>] icmp_rcv+0x271/0x450
[<ffffffff816a4ca7>] ip_local_deliver_finish+0x127/0x3a0
[<ffffffff816a4bc1>] ? ip_local_deliver_finish+0x41/0x3a0
[<ffffffff816a5160>] ip_local_deliver+0x60/0xd0
[<ffffffff816a4b80>] ? ip_rcv_finish+0x560/0x560
[<ffffffff816a46fd>] ip_rcv_finish+0xdd/0x560
[<ffffffff816a5453>] ip_rcv+0x283/0x3e0
[<ffffffff810b6302>] ? match_held_lock+0x192/0x200
[<ffffffff816a4620>] ? inet_del_offload+0x40/0x40
[<ffffffff8165d062>] __netif_receive_skb_core+0x392/0xae0
[<ffffffff8165e68e>] ? process_backlog+0x8e/0x230
[<ffffffff810b53f1>] ? mark_held_locks+0x71/0x90
[<ffffffff8165d7c8>] __netif_receive_skb+0x18/0x60
[<ffffffff8165e678>] process_backlog+0x78/0x230
[<ffffffff8165e6dd>] ? process_backlog+0xdd/0x230
[<ffffffff8165e355>] net_rx_action+0x155/0x400
[<ffffffff8106b48c>] __do_softirq+0xcc/0x420
[<ffffffff816a8e87>] ? ip_finish_output2+0x217/0x590
[<ffffffff8178e78c>] do_softirq_own_stack+0x1c/0x30
<EOI>
[<ffffffff8106b88e>] do_softirq+0x4e/0x60
[<ffffffff8106b948>] __local_bh_enable_ip+0xa8/0xb0
[<ffffffff816a8eb0>] ip_finish_output2+0x240/0x590
[<ffffffff816a9a31>] ? ip_do_fragment+0x831/0x8a0
[<ffffffff816a9a31>] ip_do_fragment+0x831/0x8a0
[<ffffffff816a8c70>] ? ip_copy_metadata+0x1b0/0x1b0
[<ffffffff816a9ae3>] ip_fragment.constprop.49+0x43/0x80
[<ffffffff816a9c9c>] ip_finish_output+0x17c/0x340
[<ffffffff8169a6f4>] ? nf_hook_slow+0xe4/0x190
[<ffffffff816ab4c0>] ip_output+0x70/0x110
[<ffffffff816a9b20>] ? ip_fragment.constprop.49+0x80/0x80
[<ffffffff816aa9f9>] ip_local_out+0x39/0x70
[<ffffffff816abf89>] ip_send_skb+0x19/0x40
[<ffffffff816abfe3>] ip_push_pending_frames+0x33/0x40
[<ffffffff816d55d3>] raw_sendmsg+0x7d3/0xc30
[<ffffffff810b732b>] ? __lock_acquire+0x3db/0x1b90
[<ffffffff816e7557>] ? inet_sendmsg+0xc7/0x1d0
[<ffffffff810b63c4>] ? __lock_is_held+0x54/0x70
[<ffffffff816e759a>] inet_sendmsg+0x10a/0x1d0
[<ffffffff816e7495>] ? inet_sendmsg+0x5/0x1d0
[<ffffffff8163e398>] sock_sendmsg+0x38/0x50
[<ffffffff8163ec5f>] ___sys_sendmsg+0x25f/0x270
[<ffffffff811aadad>] ? handle_mm_fault+0x8dd/0x1320
[<ffffffff8178c147>] ? _raw_spin_unlock+0x27/0x40
[<ffffffff810529b2>] ? __do_page_fault+0x1e2/0x460
[<ffffffff81204886>] ? __fget_light+0x66/0x90
[<ffffffff8163f8e2>] __sys_sendmsg+0x42/0x80
[<ffffffff8163f932>] SyS_sendmsg+0x12/0x20
[<ffffffff8178cb17>] entry_SYSCALL_64_fastpath+0x12/0x6f
Code: 00 00 44 89 e0 e9 7c fb ff ff 4c 89 ff e8 e7 e7 ff ff 41 8b 9d 80 00 00 00 2b 5d d4 89 d8 c1 f8 03 0f b7 c0 e9 33 ff ff f
66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48
RIP [<ffffffff816a9a92>] ip_do_fragment+0x892/0x8a0
RSP <ffff88006d603170>
Fixes: 7f8a436eaa2c ("openvswitch: Add conntrack action")
Signed-off-by: Joe Stringer <joe@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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into drm-fixes
Misc radeon and amdgpu fixes:
- SMU firmware loading fix for Stoney
- DP audio fixes for DCE4.1
- Don't expose fbdev device if no connectors
- fix page table LRU list update handling
* 'drm-fixes-4.5' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: only move pt bos in LRU list on success
drm/radeon: fix DP audio support for APU with DCE4.1 display engine
drm/radeon: Add a common function for DFS handling
drm/radeon: cleaned up VCO output settings for DP audio
drm/amd/powerplay: Update SMU firmware loading for Stoney
drm/amdgpu: don't init fbdev if we don't have any connectors
drm/radeon: only init fbdev if we have connectors
drm/radeon: Ensure radeon bo is unreserved in radeon_gem_va_ioctl
drm/amdgpu: fix next_rptr handling for debugfs
drm/radeon: properly byte swap vce firmware setup
drm/amdgpu: add a message to indicate when powerplay is enabled (v2)
drm/amdgpu: fix amdgpu_bo_pin_restricted VRAM placing v2
drm/amd/amdgpu: Improve amdgpu_dpm* macros to avoid unexpected result (v2)
drm/amdgpu: Allow the driver to load if amdgpu.powerplay=1 on asics without powerplay support
drm/amdgpu: Use drm_calloc_large for VM page_tables array
drm/amdgpu: Add some tweaks to gfx 8 soft reset
drm/amdgpu: fix tonga smu resume
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Xin Long says:
====================
fix the transport dead race check by using atomic_add_unless on refcnt
sctp: fix the transport dead race check by using atomic_add_unless on
refcnt
sctp: hold transport before we access t->asoc in sctp proc
sctp: remove the dead field of sctp_transport
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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After we use refcnt to check if transport is alive, the dead can be
removed from sctp_transport.
The traversal of transport_addr_list in procfs dump is using
list_for_each_entry_rcu, no need to check if it has been freed.
sctp_generate_t3_rtx_event and sctp_generate_heartbeat_event is
protected by sock lock, it's not necessary to check dead, either.
also, the timers are cancelled when sctp_transport_free() is
called, that it doesn't wait for refcnt to reach 0 to cancel them.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Previously, before rhashtable, /proc assoc listing was done by
read-locking the entire hash entry and dumping all assocs at once, so we
were sure that the assoc wasn't freed because it wouldn't be possible to
remove it from the hash meanwhile.
Now we use rhashtable to list transports, and dump entries one by one.
That is, now we have to check if the assoc is still a good one, as the
transport we got may be being freed.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now when __sctp_lookup_association is running in BH, it will try to
check if t->dead is set, but meanwhile other CPUs may be freeing this
transport and this assoc and if it happens that
__sctp_lookup_association checked t->dead a bit too early, it may think
that the association is still good while it was already freed.
So we fix this race by using atomic_add_unless in sctp_transport_hold.
After we get one transport from hashtable, we will hold it only when
this transport's refcnt is not 0, so that we can make sure t->asoc
cannot be freed before we hold the asoc again.
Note that sctp association is not freed using RCU so we can't use
atomic_add_unless() with it as it may just be too late for that either.
Fixes: 4f0087812648 ("sctp: apply rhashtable api to send/recv path")
Reported-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jiri Pirko says:
====================
mlxsw: driver fixes
Couple of various mlxsw driver fixes.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The rx_lane, tx_lane and module fields in the PMLP register don't have
an additional offset besides the base one (0x04), so set it to 0x00.
Fixes: 4ec14b7634b2 ("mlxsw: Add interface to access registers and process events")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When dumping the FDB we can't compare the actual pointers of the ports
structs, as it's possible the struct represents a vPort instead of the
underlying physical port.
Solve this by comparing the local port number instead, as it's shared
between the physical ports and all the vPorts on top of him.
Fixes: 54a732018d8e ("mlxsw: spectrum: Adjust switchdev ops for VLAN devices")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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LAG FDB records can only point to LAG devices or VLAN devices configured
on top of them. Therefore, when dumping the FDB we shouldn't associate
these records with the underlying physical ports.
Fixes: 8a1ab5d76639 ("mlxsw: spectrum: Implement FDB add/remove/dump for LAG")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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LAG FDB entries pointing to VLAN devices should be reported to the
bridge with the matching VLAN device and not the underlying LAG device.
Fixes: aac78a440887 ("mlxsw: spectrum: Adjust FDB notifications for VLAN devices")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When dumping the hardware FDB we should report entries pointing to VLAN
devices with VLAN 0, as packets coming into the bridge are untagged.
Likewise, pass FDB_{ADD,DEL} notifications with VLAN 0 for these
devices.
Fixes: 54a732018d8e ("mlxsw: spectrum: Adjust switchdev ops for VLAN devices")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When we disable learning on bridge port we should still update the
software bridge's FDB when entry pointing to this bridge port is
aged-out. We can otherwise have an inconsistency between software and
hardware tables.
Fixes: 8a1ab5d76639 ("mlxsw: spectrum: Implement FDB add/remove/dump for LAG")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When port is put into LISTENING state it shouldn't populate the FDB, so
set the port's STP state in hardware to DISCARDING instead of LEARNING.
It will therefore keep listening to BPDU packets, but discard other
non-control packets and won't perform any learning.
Fixes: 56ade8fe3fe1 ("mlxsw: spectrum: Add initial support for Spectrum ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When STP state is set to DISABLED the port is assumed to be inactive, but
currently we forward packets ingressing through it.
Instead, set the port's STP state in hardware to DISCARDING, which means
it doesn't forward packets or perform any learning, but it does trap
control packets. However, these packets will be dropped by bridge code,
which results in the expected behavior.
Fixes: 56ade8fe3fe1 ("mlxsw: spectrum: Add initial support for Spectrum ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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As explained in previous commit, we should always take care of flushing
the FDB in the driver and not rely on bridge code.
We need to distinguish between two cases with regards to LAG:
1) Port is leaving LAG while LAG is bridged (or VLAN devices on top of
it). In this case don't flush the FDB entries pointing to the LAG ID, as
this will affect other ports still member in the LAG. Only flush the FDB
when the last port in the LAG is leaving the bridge.
2) LAG device is leaving the bridge. In this case the CHANGEUPPER event
is simply propagated to each member port, so make each port flush the
FDB in its turn.
Note that emptying a bridged LAG from ports creates an inconsistency
between hardware and software. A user who later (< ageing_time)
re-populates the LAG won't have any FDB entries pointing to the LAG ID
in hardware, but they will be present in the software bridge's FDB.
Currently there is no good solution to this problem, but this will be
addressed by us in the future.
In order to optimize the flushing process, flush by port or LAG ID if
there are no VLAN interfaces on top of the port. Otherwise, flush using
(Port / LAG ID, FID=VID} for each of the lower 4K FIDs. In the case of
VLAN device simply flush using {Port / LAG ID, vFID} with the vFID to
which the VLAN device is mapped to.
Fixes: 56ade8fe3fe1 ("mlxsw: spectrum: Add initial support for Spectrum ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
