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Convert the NXP SJA1000 CAN Controller Device Tree binding
documentation to json-schema.
Update the example to match reality.
Link: https://lore.kernel.org/all/20220710115248.190280-2-biju.das.jz@bp.renesas.com
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde says:
====================
can: slcan: checkpatch cleanups
This is a patch series consisting of various checkpatch cleanups for
the slcan driver.
====================
Link: https://lore.kernel.org/all/20220704125954.1587880-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Remove braces after if() for single statement blocks, also remove else
after return() in if() block.
Link: https://lore.kernel.org/all/20220704125954.1587880-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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All comparison to NULL could be written "!val", convert them to make
checkpatch happy.
Link: https://lore.kernel.org/all/20220704125954.1587880-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Add and remove whitespace to make checkpatch happy.
Link: https://lore.kernel.org/all/20220704125954.1587880-4-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Convert the last printk(LEVEL ...) to pr_level().
Link: https://lore.kernel.org/all/20220704125954.1587880-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Convert all comments to network subsystem style comments.
Link: https://lore.kernel.org/all/20220704125954.1587880-2-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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The snprintf() function returns the number of bytes which *would* have
been copied if there were no space. So, since this code does not check
the return value, there if the buffer was not large enough then there
would be a buffer overflow two lines later when it does:
actual = sl->tty->ops->write(sl->tty, sl->xbuff, n);
Use scnprintf() instead because that returns the number of bytes which
were actually copied.
Fixes: 52f9ac85b876 ("can: slcan: allow to send commands to the adapter")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/all/YsVA9KoY/ZSvNGYk@kili
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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During the refactoring for the ksz8_dev_ops from ksz8795.c to
ksz_common.c, the ksz8_r_mib_cnt has been missed. So this patch adds the
missing one.
Fixes: 6ec23aaaac43 ("net: dsa: microchip: move ksz_dev_ops to ksz_common.c")
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220718061803.4939-1-arun.ramadoss@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Taehee Yoo says:
====================
amt: fix validation and synchronization bugs
There are some synchronization issues in the amt module.
Especially, an amt gateway doesn't well synchronize its own variables
and status(amt->status).
It tries to use a workqueue for handles in a single thread.
A global lock is also good, but it would occur complex locking complex.
In this patchset, only the gateway uses workqueue.
The reason why only gateway interface uses workqueue is that gateway
should manage its own states and variables a little bit statefully.
But relay doesn't need to manage tunnels statefully, stateless is okay.
So, relay side message handlers are okay to be called concurrently.
But it doesn't mean that no lock is needed.
Only amt multicast data message type will not be processed by the work
queue because It contains actual multicast data.
So, it should be processed immediately.
When any amt gateway events are triggered(sending discovery message by
delayed_work, sending request message by delayed_work and receiving
messages), it stores event and skb into the event queue(amt->events[16]).
Then, workqueue processes these events one by one.
The first patch is to use the work queue.
The second patch is to remove unnecessary lock due to a previous patch.
The third patch is to use READ_ONCE() in the amt module.
Even if the amt module uses a single thread, some variables (ready4,
ready6, amt->status) can be accessed concurrently.
The fourth patch is to add missing nonce generation logic when it sends a
new request message.
The fifth patch is to drop unexpected advertisement messages.
advertisement message should be received only after the gateway sends
a discovery message first.
So, the gateway should drop advertisement messages if it has never
sent a discovery message and it also should drop duplicate advertisement
messages.
Using nonce is good to distinguish whether a received message is an
expected message or not.
The sixth patch is to drop unexpected query messages.
This is the same behavior as the fourth patch.
Query messages should be received only after the gateway sends a request
message first.
The nonce variable is used to distinguish whether it is a reply to a
previous request message or not.
amt->ready4 and amt->ready6 are used to distinguish duplicate messages.
The seventh patch is to drop unexpected multicast data.
AMT gateway should not receive multicast data message type before
establish between gateway and relay.
In order to drop unexpected multicast data messages, it checks amt->status.
The last patch is to fix a locking problem on the relay side.
amt->nr_tunnels variable is protected by amt->lock.
But amt_request_handler() doesn't protect this variable.
v2:
- Use local_bh_disable() instead of rcu_read_lock_bh() in
amt_membership_query_handler.
- Fix using uninitialized variables.
- Fix unexpectedly start the event_wq after stopping.
- Fix possible deadlock in amt_event_work().
- Add a limit variable in amt_event_work() to prevent infinite working.
- Rename amt_queue_events() to amt_queue_event().
====================
Link: https://lore.kernel.org/r/20220717160910.19156-1-ap420073@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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amt->nr_tunnels is protected by amt->lock.
But, amt_request_handler() has been using this variable without the
amt->lock.
So, it expands context of amt->lock in the amt_request_handler() to
protect amt->nr_tunnels variable.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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AMT gateway interface should not receive unexpected multicast data.
Multicast data message type should be received after sending an update
message, which means all establishment between gateway and relay is
finished.
So, amt_multicast_data_handler() checks amt->status.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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AMT gateway interface should not receive unexpected query messages.
In order to drop unexpected query messages, it checks nonce.
And it also checks ready4 and ready6 variables to drop duplicated messages.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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AMT gateway interface should not receive unexpected advertisement messages.
In order to drop these packets, it should check nonce and amt->status.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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When AMT gateway starts sending a new request message, it should
regenerate the nonce variable.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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There are some data races in the amt module.
amt->ready4, amt->ready6, and amt->status can be accessed concurrently
without locks.
So, it uses READ_ONCE() and WRITE_ONCE().
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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By the previous patch, amt gateway handlers are changed to worked by
a single thread.
So, most locks for gateway are not needed.
So, it removes.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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There are some synchronization issues(amt->status, amt->req_cnt, etc)
if the interface is in gateway mode because gateway message handlers
are processed concurrently.
This applies a work queue for processing these messages instead of
expanding the locking context.
So, the purposes of this patch are to fix exist race conditions and to make
gateway to be able to validate a gateway status more correctly.
When the AMT gateway interface is created, it tries to establish to relay.
The establishment step looks stateless, but it should be managed well.
In order to handle messages in the gateway, it saves the current
status(i.e. AMT_STATUS_XXX).
This patch makes gateway code to be worked with a single thread.
Now, all messages except the multicast are triggered(received or
delay expired), and these messages will be stored in the event
queue(amt->events).
Then, the single worker processes stored messages asynchronously one
by one.
The multicast data message type will be still processed immediately.
Now, amt->lock is only needed to access the event queue(amt->events)
if an interface is the gateway mode.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Add spi_device_id entries to silent SPI warnings.
Fixes: 5fa6863ba692 ("spi: Check we have a spi_device_id for each DT compatible")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20220717135831.2492844-2-o.rempel@pengutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Add spi_device_id entries to silent following warnings:
SPI driver sja1105 has no spi_device_id for nxp,sja1105e
SPI driver sja1105 has no spi_device_id for nxp,sja1105t
SPI driver sja1105 has no spi_device_id for nxp,sja1105p
SPI driver sja1105 has no spi_device_id for nxp,sja1105q
SPI driver sja1105 has no spi_device_id for nxp,sja1105r
SPI driver sja1105 has no spi_device_id for nxp,sja1105s
SPI driver sja1105 has no spi_device_id for nxp,sja1110a
SPI driver sja1105 has no spi_device_id for nxp,sja1110b
SPI driver sja1105 has no spi_device_id for nxp,sja1110c
SPI driver sja1105 has no spi_device_id for nxp,sja1110d
Fixes: 5fa6863ba692 ("spi: Check we have a spi_device_id for each DT compatible")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220717135831.2492844-1-o.rempel@pengutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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be_cmd_read_port_transceiver_data assumes that it is given a buffer that
is at least PAGE_DATA_LEN long, or twice that if the module supports SFF
8472. However, this is not always the case.
Fix this by passing the desired offset and length to
be_cmd_read_port_transceiver_data so that we only copy the bytes once.
Fixes: e36edd9d26cf ("be2net: add ethtool "-m" option support")
Signed-off-by: Hristo Venev <hristo@venev.name>
Link: https://lore.kernel.org/r/20220716085134.6095-1-hristo@venev.name
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Propagate ingress/egress direction for 'police' action down to hardware.
Co-developed-by: Volodymyr Mytnyk <volodymyr.mytnyk@plvision.eu>
Signed-off-by: Volodymyr Mytnyk <volodymyr.mytnyk@plvision.eu>
Signed-off-by: Maksym Glubokiy <maksym.glubokiy@plvision.eu>
Link: https://lore.kernel.org/r/20220714083541.1973919-1-maksym.glubokiy@plvision.eu
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
Tony Nguyen says:
====================
100GbE Intel Wired LAN Driver Updates 2022-07-15
This series contains updates to ice driver only.
Ani updates feature restriction for devices that don't support external
time stamping.
Zhuo Chen removes unnecessary call to pci_aer_clear_nonfatal_status().
* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
ice: Remove pci_aer_clear_nonfatal_status() call
ice: Add EXTTS feature to the feature bitmap
====================
Link: https://lore.kernel.org/r/20220715214642.2968799-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The port fields in the ethool flow structures are defined
to be __be16 types, so sparse is showing issues where these
are being passed to htons(). Fix these warnings by passing
them to be16_to_cpu() instead.
These are being used in netdev_dbg() so should only effect
anyone doing debug.
Fixes the following sparse warnings:
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
Link: https://lore.kernel.org/r/20220715173009.526126-1-ben.dooks@sifive.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Make the code look better.
Signed-off-by: Maksym Glubokiy <maksym.glubokiy@plvision.eu>
Link: https://lore.kernel.org/r/20220715103806.7108-1-maksym.glubokiy@plvision.eu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Make generic XDP processing attribute packets to their actual
queues instead of queue #0. This improves AF_XDP performance
considerably since softirq threads no longer fight over single
AF_XDP socket spinlock.
Signed-off-by: Andrey Turkin <andrey.turkin@gmail.com>
Link: https://lore.kernel.org/r/20220717022050.822766-2-andrey.turkin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Disable is done in stmmac_init_eee() on the event of MAC link down.
Since setting enable/disable EEE via ethtool will eventually trigger
a MAC down, removing this redunctant call in stmmac_ethtool.c to avoid
calling xpcs_config_eee() twice.
Fixes: d4aeaed80b0e ("net: stmmac: trigger PCS EEE to turn off on link down")
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Link: https://lore.kernel.org/r/20220715122402.1017470-1-vee.khee.wong@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Vladimir Oltean says:
====================
Fix 2 DSA issues with vlan_filtering_is_global
This patch set fixes 2 issues with vlan_filtering_is_global switches.
Both are regressions introduced by refactoring commit d0004a020bb5
("net: dsa: remove the "dsa_to_port in a loop" antipattern from the
core"), which wasn't tested on a wide enough variety of switches.
Tested on the sja1105 driver.
====================
Link: https://lore.kernel.org/r/20220715151659.780544-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The "ds" iterator variable used in dsa_port_reset_vlan_filtering() ->
dsa_switch_for_each_port() overwrites the "dp" received as argument,
which is later used to call dsa_port_vlan_filtering() proper.
As a result, switches which do enter that code path (the ones with
vlan_filtering_is_global=true) will dereference an invalid dp in
dsa_port_reset_vlan_filtering() after leaving a VLAN-aware bridge.
Use a dedicated "other_dp" iterator variable to avoid this from
happening.
Fixes: d0004a020bb5 ("net: dsa: remove the "dsa_to_port in a loop" antipattern from the core")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The blamed refactoring commit changed a "port" iterator with "other_dp",
but still looked at the slave_dev of the dp outside the loop, instead of
other_dp->slave from the loop.
As a result, dsa_port_vlan_filtering() would not call
dsa_slave_manage_vlan_filtering() except for the port in cause, and not
for all switch ports as expected.
Fixes: d0004a020bb5 ("net: dsa: remove the "dsa_to_port in a loop" antipattern from the core")
Reported-by: Lucian Banu <Lucian.Banu@westermo.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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It is possible to disable VFs while the PF driver is processing requests
from the VF driver. This can result in a panic.
BUG: unable to handle kernel paging request at 000000000000106c
PGD 0 P4D 0
Oops: 0000 [#1] SMP NOPTI
CPU: 8 PID: 0 Comm: swapper/8 Kdump: loaded Tainted: G I --------- -
Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020
RIP: 0010:ixgbe_msg_task+0x4c8/0x1690 [ixgbe]
Code: 00 00 48 8d 04 40 48 c1 e0 05 89 7c 24 24 89 fd 48 89 44 24 10 83 ff
01 0f 84 b8 04 00 00 4c 8b 64 24 10 4d 03 a5 48 22 00 00 <41> 80 7c 24 4c
00 0f 84 8a 03 00 00 0f b7 c7 83 f8 08 0f 84 8f 0a
RSP: 0018:ffffb337869f8df8 EFLAGS: 00010002
RAX: 0000000000001020 RBX: 0000000000000000 RCX: 000000000000002b
RDX: 0000000000000002 RSI: 0000000000000008 RDI: 0000000000000006
RBP: 0000000000000006 R08: 0000000000000002 R09: 0000000000029780
R10: 00006957d8f42832 R11: 0000000000000000 R12: 0000000000001020
R13: ffff8a00e8978ac0 R14: 000000000000002b R15: ffff8a00e8979c80
FS: 0000000000000000(0000) GS:ffff8a07dfd00000(0000) knlGS:00000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000106c CR3: 0000000063e10004 CR4: 00000000007726e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<IRQ>
? ttwu_do_wakeup+0x19/0x140
? try_to_wake_up+0x1cd/0x550
? ixgbevf_update_xcast_mode+0x71/0xc0 [ixgbevf]
ixgbe_msix_other+0x17e/0x310 [ixgbe]
__handle_irq_event_percpu+0x40/0x180
handle_irq_event_percpu+0x30/0x80
handle_irq_event+0x36/0x53
handle_edge_irq+0x82/0x190
handle_irq+0x1c/0x30
do_IRQ+0x49/0xd0
common_interrupt+0xf/0xf
This can be eventually be reproduced with the following script:
while :
do
echo 63 > /sys/class/net/<devname>/device/sriov_numvfs
sleep 1
echo 0 > /sys/class/net/<devname>/device/sriov_numvfs
sleep 1
done
Add lock when disabling SR-IOV to prevent process VF mailbox communication.
Fixes: d773d1310625 ("ixgbe: Fix memory leak when SR-IOV VFs are direct assigned")
Signed-off-by: Piotr Skajewski <piotrx.skajewski@intel.com>
Tested-by: Marek Szlosek <marek.szlosek@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://lore.kernel.org/r/20220715214456.2968711-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Fix an issue when driver incorrectly detects state
of recovery process and erroneously reinitializes interrupts,
which results in a kernel error and call trace message.
The issue was caused by a combination of two factors:
1. Assuming the EMP reset issued after completing
firmware recovery means the whole recovery process is complete.
2. Erroneous reinitialization of interrupt vector after detecting
the above mentioned EMP reset.
Fixes (1) by changing how recovery state change is detected
and (2) by adjusting the conditional expression to ensure using proper
interrupt reinitialization method, depending on the situation.
Fixes: 4ff0ee1af016 ("i40e: Introduce recovery mode support")
Signed-off-by: Dawid Lukwinski <dawid.lukwinski@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://lore.kernel.org/r/20220715214542.2968762-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In mtk_wed_tx_ring_setup(.., int idx, ..), idx is used as an index here
struct mtk_wed_ring *ring = &dev->tx_ring[idx];
The bounds of idx are checked here
BUG_ON(idx > ARRAY_SIZE(dev->tx_ring));
If idx is the size of the array, it will pass this check and overflow.
So change the check to >= .
Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220716214654.1540240-1-trix@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Jiri Pirko says:
====================
devlink: prepare mlxsw and netdevsim for locked reload
This is preparation patchset to be able to eventually make a switch and
make reload cmd to take devlink->lock as the other commands do.
This patchset is preparing 2 major users of devlink API - mlxsw and
netdevsim. The sets of functions are similar, therefore taking care of
both here.
====================
Link: https://lore.kernel.org/r/20220716110241.3390528-1-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Remove locked versions of functions that are no longer used by anyone.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Prepare for devlink reload being called with devlink->lock held and
convert the netdevsim driver to use unlocked devlink API during init and
fini flows. Take devl_lock() in reload_down() and reload_up() ops in the
meantime before reload cmd is converted to take the lock itself.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add unlocked variants of devlink_region_create/destroy() functions
to be used in drivers called-in with devlink->lock held.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Prepare for devlink reload being called with devlink->lock held and
convert the mlxsw driver to use unlocked devlink API during init and
fini flows. Take devl_lock() in reload_down() and reload_up() ops in the
meantime before reload cmd is converted to take the lock itself.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add unlocked variants of devlink_dpipe*() functions to be used
in drivers called-in with devlink->lock held.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add unlocked variants of devlink_sb*() functions to be used
in drivers called-in with devlink->lock held.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add unlocked variants of devlink_resource*() functions to be used
in drivers called-in with devlink->lock held.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add unlocked variants of devl_trap*() functions to be used in drivers
called-in with devlink->lock held.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a lock_class_key per devlink instance to avoid DEADLOCK warning by
lockdep, while locking more than one devlink instance in driver code,
for example in opening VFs flow.
Kernel log:
[ 101.433802] ============================================
[ 101.433803] WARNING: possible recursive locking detected
[ 101.433810] 5.19.0-rc1+ #35 Not tainted
[ 101.433812] --------------------------------------------
[ 101.433813] bash/892 is trying to acquire lock:
[ 101.433815] ffff888127bfc2f8 (&devlink->lock){+.+.}-{3:3}, at: probe_one+0x3c/0x690 [mlx5_core]
[ 101.433909]
but task is already holding lock:
[ 101.433910] ffff888118f4c2f8 (&devlink->lock){+.+.}-{3:3}, at: mlx5_core_sriov_configure+0x62/0x280 [mlx5_core]
[ 101.433989]
other info that might help us debug this:
[ 101.433990] Possible unsafe locking scenario:
[ 101.433991] CPU0
[ 101.433991] ----
[ 101.433992] lock(&devlink->lock);
[ 101.433993] lock(&devlink->lock);
[ 101.433995]
*** DEADLOCK ***
[ 101.433996] May be due to missing lock nesting notation
[ 101.433996] 6 locks held by bash/892:
[ 101.433998] #0: ffff88810eb50448 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0xf3/0x1d0
[ 101.434009] #1: ffff888114777c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x20d/0x520
[ 101.434017] #2: ffff888102b58660 (kn->active#231){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x230/0x520
[ 101.434023] #3: ffff888102d70198 (&dev->mutex){....}-{3:3}, at: sriov_numvfs_store+0x132/0x310
[ 101.434031] #4: ffff888118f4c2f8 (&devlink->lock){+.+.}-{3:3}, at: mlx5_core_sriov_configure+0x62/0x280 [mlx5_core]
[ 101.434108] #5: ffff88812adce198 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x430
[ 101.434116]
stack backtrace:
[ 101.434118] CPU: 5 PID: 892 Comm: bash Not tainted 5.19.0-rc1+ #35
[ 101.434120] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
[ 101.434130] Call Trace:
[ 101.434133] <TASK>
[ 101.434135] dump_stack_lvl+0x57/0x7d
[ 101.434145] __lock_acquire.cold+0x1df/0x3e7
[ 101.434151] ? register_lock_class+0x1880/0x1880
[ 101.434157] lock_acquire+0x1c1/0x550
[ 101.434160] ? probe_one+0x3c/0x690 [mlx5_core]
[ 101.434229] ? lockdep_hardirqs_on_prepare+0x400/0x400
[ 101.434232] ? __xa_alloc+0x1ed/0x2d0
[ 101.434236] ? ksys_write+0xf3/0x1d0
[ 101.434239] __mutex_lock+0x12c/0x14b0
[ 101.434243] ? probe_one+0x3c/0x690 [mlx5_core]
[ 101.434312] ? probe_one+0x3c/0x690 [mlx5_core]
[ 101.434380] ? devlink_alloc_ns+0x11b/0x910
[ 101.434385] ? mutex_lock_io_nested+0x1320/0x1320
[ 101.434388] ? lockdep_init_map_type+0x21a/0x7d0
[ 101.434391] ? lockdep_init_map_type+0x21a/0x7d0
[ 101.434393] ? __init_swait_queue_head+0x70/0xd0
[ 101.434397] probe_one+0x3c/0x690 [mlx5_core]
[ 101.434467] pci_device_probe+0x1b4/0x480
[ 101.434471] really_probe+0x1e0/0xaa0
[ 101.434474] __driver_probe_device+0x219/0x480
[ 101.434478] driver_probe_device+0x49/0x130
[ 101.434481] __device_attach_driver+0x1b8/0x280
[ 101.434484] ? driver_allows_async_probing+0x140/0x140
[ 101.434487] bus_for_each_drv+0x123/0x1a0
[ 101.434489] ? bus_for_each_dev+0x1a0/0x1a0
[ 101.434491] ? lockdep_hardirqs_on_prepare+0x286/0x400
[ 101.434494] ? trace_hardirqs_on+0x2d/0x100
[ 101.434498] __device_attach+0x1a3/0x430
[ 101.434501] ? device_driver_attach+0x1e0/0x1e0
[ 101.434503] ? pci_bridge_d3_possible+0x1e0/0x1e0
[ 101.434506] ? pci_create_resource_files+0xeb/0x190
[ 101.434511] pci_bus_add_device+0x6c/0xa0
[ 101.434514] pci_iov_add_virtfn+0x9e4/0xe00
[ 101.434517] ? trace_hardirqs_on+0x2d/0x100
[ 101.434521] sriov_enable+0x64a/0xca0
[ 101.434524] ? pcibios_sriov_disable+0x10/0x10
[ 101.434528] mlx5_core_sriov_configure+0xab/0x280 [mlx5_core]
[ 101.434602] sriov_numvfs_store+0x20a/0x310
[ 101.434605] ? sriov_totalvfs_show+0xc0/0xc0
[ 101.434608] ? sysfs_file_ops+0x170/0x170
[ 101.434611] ? sysfs_file_ops+0x117/0x170
[ 101.434614] ? sysfs_file_ops+0x170/0x170
[ 101.434616] kernfs_fop_write_iter+0x348/0x520
[ 101.434619] new_sync_write+0x2e5/0x520
[ 101.434621] ? new_sync_read+0x520/0x520
[ 101.434624] ? lock_acquire+0x1c1/0x550
[ 101.434626] ? lockdep_hardirqs_on_prepare+0x400/0x400
[ 101.434630] vfs_write+0x5cb/0x8d0
[ 101.434633] ksys_write+0xf3/0x1d0
[ 101.434635] ? __x64_sys_read+0xb0/0xb0
[ 101.434638] ? lockdep_hardirqs_on_prepare+0x286/0x400
[ 101.434640] ? syscall_enter_from_user_mode+0x1d/0x50
[ 101.434643] do_syscall_64+0x3d/0x90
[ 101.434647] entry_SYSCALL_64_after_hwframe+0x46/0xb0
[ 101.434650] RIP: 0033:0x7f5ff536b2f7
[ 101.434658] Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f
1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f
05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
[ 101.434661] RSP: 002b:00007ffd9ea85d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 101.434664] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f5ff536b2f7
[ 101.434666] RDX: 0000000000000002 RSI: 000055c4c279e230 RDI: 0000000000000001
[ 101.434668] RBP: 000055c4c279e230 R08: 000000000000000a R09: 0000000000000001
[ 101.434669] R10: 000055c4c283cbf0 R11: 0000000000000246 R12: 0000000000000002
[ 101.434670] R13: 00007f5ff543d500 R14: 0000000000000002 R15: 00007f5ff543d700
[ 101.434673] </TASK>
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Horatiu Vultur says:
====================
net: lan966x: Fix issues with MAC table
The patch series fixes 2 issues:
- when an entry was forgotten the irq thread was holding a spin lock and then
was talking also rtnl_lock.
- the access to the HW MAC table is indirect, so the access to the HW MAC
table was not synchronized, which means that there could be race conditions.
====================
Link: https://lore.kernel.org/r/20220714194040.231651-1-horatiu.vultur@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When the SW bridge was trying to add/remove entries to/from HW, the
access to HW was not protected by any lock. In this way, it was
possible to have race conditions.
Fix this by using the lan966x->mac_lock to protect parallel access to HW
for this cases.
Fixes: 25ee9561ec622 ("net: lan966x: More MAC table functionality")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The problem with this spin lock is that it was just protecting the list
of the MAC entries in SW and not also the access to the MAC entries in HW.
Because the access to HW is indirect, then it could happen to have race
conditions.
For example when SW introduced an entry in MAC table and the irq mac is
trying to read something from the MAC.
Update such that also the access to MAC entries in HW is protected by
this lock.
Fixes: 5ccd66e01cbef ("net: lan966x: add support for interrupts from analyzer")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
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To remove an entry to the MAC table, it is required first to setup the
entry and then issue a command for the MAC to forget the entry.
So if it happens for two threads to remove simultaneously an entry
in MAC table then it would be a race condition.
Fix this by using lan966x->mac_lock to protect the HW access.
Fixes: e18aba8941b40 ("net: lan966x: add mactable support")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
To add an entry to the MAC table, it is required first to setup the
entry and then issue a command for the MAC to learn the entry.
So if it happens for two threads to add simultaneously an entry in MAC
table then it would be a race condition.
Fix this by using lan966x->mac_lock to protect the HW access.
Fixes: fc0c3fe7486f2 ("net: lan966x: Add function lan966x_mac_ip_learn()")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
When the HW deletes an entry in MAC table then it generates an
interrupt. The SW will go through it's own list of MAC entries and if it
is not found then it would notify the listeners about this. The problem
is that when the SW will go through it's own list it would take a spin
lock(lan966x->mac_lock) and when it notifies that the entry is deleted.
But to notify the listeners it taking the rtnl_lock which is illegal.
This is fixed by instead of notifying right away that the entry is
deleted, move the entry on a temp list and once, it checks all the
entries then just notify that the entries from temp list are deleted.
Fixes: 5ccd66e01cbe ("net: lan966x: add support for interrupts from analyzer")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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We don't want to list every single ubuf_info callback in
skb_orphan_frags(), add a flag controlling the behaviour.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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