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2015-01-14net/macb: improved ethtool statistics supportXander Huff
Currently `ethtool -S` simply returns "no stats available". It would be more useful to see what the various ethtool statistics registers' values are. This change implements get_ethtool_stats, get_strings, and get_sset_count functions to accomplish this. Read all GEM statistics registers and sum them into macb.ethtool_stats. Add the necessary infrastructure to make this accessible via `ethtool -S`. Update gem_update_stats to utilize ethtool_stats. Signed-off-by: Xander Huff <xander.huff@ni.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14net/macb: Adding comments to various #defs to make interpretation easierXander Huff
This change is to help improve at-a-glace knowledge of the purpose of the various Cadence MACB/GEM registers. Comments are more helpful for human readability than short acronyms. Describe various #define varibles Cadence MACB/GEM registers as documented in Xilinix's "Zynq-7000 All Programmable SoC TechnicalReference Manual, v1.9.1 (UG-585)" Signed-off-by: Xander Huff <xander.huff@ni.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14Merge branch 'xen-netfront-next'David S. Miller
David Vrabel says: ==================== xen-netfront: refactor making Tx requests As netfront as evolved to handle different sorts of skbs the code to fill a Tx requests has been copy and pasted several times. The series refactors this and a few other areas. The first patch is to a Xen header but this can be merged via net-next. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14xen-netfront: refactor making Tx requestsDavid Vrabel
Eliminate all the duplicate code for making Tx requests by consolidating them into a single xennet_make_one_txreq() function. xennet_make_one_txreq() and xennet_make_txreqs() work with pages and offsets so it will be easier to make netfront handle highmem frags in the future. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14xen-netfront: refactor skb slot countingDavid Vrabel
A function to count the number of slots an skb needs is more useful than one that counts the slots needed for only the frags. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14xen: add page_to_mfn()David Vrabel
pfn_to_mfn(page_to_pfn(p)) is a common use case so add a generic helper for it. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14rhashtable: Add MAINTAINERS entryThomas Graf
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14rhashtable: Lower/upper bucket may map to same lock while shrinkingThomas Graf
Each per bucket lock covers a configurable number of buckets. While shrinking, two buckets in the old table contain entries for a single bucket in the new table. We need to lock down both while linking. Check if they are protected by different locks to avoid a recursive lock. Fixes: 97defe1e ("rhashtable: Per bucket locks & deferred expansion/shrinking") Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14Merge branch 'leds-fixes-for-3.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds Pull LED fix from Bryan Wu. * 'leds-fixes-for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: leds: netxbig: fix oops at probe time
2015-01-14Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux Pull WRITE_ONCE argument order change from Christian Borntraeger: "As discussed on LKML[1] it was agreed that WRITE_ONCE(x, val) is better than ASSIGN_ONCE(val, x) Lets change that for 3.19 as 3.19 has no user yet, but the first users will hit linux-next soon" [1] http://marc.info/?l=linux-kernel&m=142081181707596 * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux: kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)
2015-01-13net: rename vlan_tx_* helpers since "tx" is misleading thereJiri Pirko
The same macros are used for rx as well. So rename it. Signed-off-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13net: sched: fix skb->protocol use in case of accelerated vlan pathJiri Pirko
tc code implicitly considers skb->protocol even in case of accelerated vlan paths and expects vlan protocol type here. However, on rx path, if the vlan header was already stripped, skb->protocol contains value of next header. Similar situation is on tx path. So for skbs that use skb->vlan_tci for tagging, use skb->vlan_proto instead. Reported-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Jiri Pirko <jiri@resnulli.us> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13atm: horizon: Remove some unused functionsRickard Strandqvist
Removes some functions that are not used anywhere: channel_to_vpivci() query_tx_channel_config() rx_disabled_handler() This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13atm: lanai: Remove unused functionRickard Strandqvist
Remove the function aal5_spacefor() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13tipc: correctly handle releasing a not fully initialized sockSasha Levin
Commit f2f9800d4955 "tipc: make tipc node table aware of net namespace" has added a dereference of sock->sk before making sure it's not NULL, which makes releasing a tipc socket NULL pointer dereference for sockets that are not fully initialized. Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13sunvnet: fix rx packet length check to allow for TSODavid L Stevens
This patch fixes the rx packet length check in the sunvnet driver to allow for a TSO max packet length greater than the LDC channel negotiated MTU. These are negotiated separately and there is no requirement that port->tsolen be less than port->rmtu, but if it isn't, it'll drop packets with rx length errors. Signed-off-by: David L Stevens <david.stevens@oracle.com> Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13xen-netfront: use different locks for Rx and Tx statsDavid Vrabel
In netfront the Rx and Tx path are independent and use different locks. The Tx lock is held with hard irqs disabled, but Rx lock is held with only BH disabled. Since both sides use the same stats lock, a deadlock may occur. [ INFO: possible irq lock inversion dependency detected ] 3.16.2 #16 Not tainted --------------------------------------------------------- swapper/0/0 just changed the state of lock: (&(&queue->tx_lock)->rlock){-.....}, at: [<c03adec8>] xennet_tx_interrupt+0x14/0x34 but this lock took another, HARDIRQ-unsafe lock in the past: (&stat->syncp.seq#2){+.-...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&stat->syncp.seq#2); local_irq_disable(); lock(&(&queue->tx_lock)->rlock); lock(&stat->syncp.seq#2); <Interrupt> lock(&(&queue->tx_lock)->rlock); Using separate locks for the Rx and Tx stats fixes this deadlock. Reported-by: Dmitry Piotrovsky <piotrovskydmitry@gmail.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13mISDN: avoid arch specific __builtin_return_address callArnd Bergmann
Not all architectures are able to call __builtin_return_address(). On ARM, the mISDN code produces this warning: hardware/mISDN/w6692.c: In function 'w6692_dctrl': hardware/mISDN/w6692.c:1181:75: warning: unsupported argument to '__builtin_return_address' pr_debug("%s: %s dev(%d) open from %p\n", card->name, __func__, ^ hardware/mISDN/mISDNipac.c: In function 'open_dchannel': hardware/mISDN/mISDNipac.c:759:75: warning: unsupported argument to '__builtin_return_address' pr_debug("%s: %s dev(%d) open from %p\n", isac->name, __func__, ^ In a lot of cases, this is relatively easy to work around by passing the value of __builtin_return_address(0) from the callers into the functions that want it. One exception is the indirect 'open' function call in struct isac_hw. While it would be possible to fix this as well, this patch only addresses the other callers properly and lets this one return the direct parent function, which should be good enough. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13infiniband: mlx5: avoid a compile-time warningArnd Bergmann
The return type of find_first_bit() is architecture specific, on ARM it is 'unsigned int', while the asm-generic code used on x86 and a lot of other architectures returns 'unsigned long'. When building the mlx5 driver on ARM, we get a warning about this: infiniband/hw/mlx5/mem.c: In function 'mlx5_ib_cont_pages': infiniband/hw/mlx5/mem.c:84:143: warning: comparison of distinct pointer types lacks a cast m = min(m, find_first_bit(&tmp, sizeof(tmp))); This patch changes the driver to use min_t to make it behave the same way on all architectures. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Eli Cohen <eli@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13mlx5: avoid build warnings on 32-bitArnd Bergmann
The mlx5 driver passes a string pointer in through a 'u64' variable, which on 32-bit machines causes a build warning: drivers/net/ethernet/mellanox/mlx5/core/debugfs.c: In function 'qp_read_field': drivers/net/ethernet/mellanox/mlx5/core/debugfs.c:303:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] The code is in fact safe, so we can shut up the warning by adding extra type casts. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13rocker: fix harmless warning on 32-bit machinesArnd Bergmann
The rocker driver tries to assign a pointer to a 64-bit integer and then back to a pointer. This is safe on all architectures, but causes a compiler warning when pointers are shorter than 64-bit: rocker/rocker.c: In function 'rocker_desc_cookie_ptr_get': rocker/rocker.c:809:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] return (void *) desc_info->desc->cookie; ^ This adds another cast to uintptr_t to tell the compiler that it's safe. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13drivers: net: cpsw: fix multicast flush in dual emac modeMugunthan V N
Since ALE table is a common resource for both the interfaces in Dual EMAC mode and while bringing up the second interface in cpsw_ndo_set_rx_mode() all the multicast entries added by the first interface is flushed out and only second interface multicast addresses are added. Fixing this by flushing multicast addresses based on dual EMAC port vlans which will not affect the other emac port multicast addresses. Fixes: d9ba8f9 (driver: net: ethernet: cpsw: dual emac interface implementation) Cc: <stable@vger.kernel.org> # v3.9+ Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13cxgb4: Ripping out old hard-wired initialization code in driverHariprasad Shenai
Removing old hard-wired initialization code in the driver, which is no longer used. Also deprecating few module parameters. Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13leds: netxbig: fix oops at probe timeSimon Guinot
This patch fixes a NULL pointer dereference on led_dat->mode_val. Due to this bug, a kernel oops can be observed at probe time on the LaCie 2Big and 5Big v2 boards: Unable to handle kernel NULL pointer dereference at virtual address 00000008 [...] [<c03f244c>] (netxbig_led_probe) from [<c02c8c6c>] (platform_drv_probe+0x4c/0x9c) [<c02c8c6c>] (platform_drv_probe) from [<c02c72d0>] (driver_probe_device+0x98/0x25c) [<c02c72d0>] (driver_probe_device) from [<c02c7520>] (__driver_attach+0x8c/0x90) [<c02c7520>] (__driver_attach) from [<c02c5c24>] (bus_for_each_dev+0x68/0x94) [<c02c5c24>] (bus_for_each_dev) from [<c02c6408>] (bus_add_driver+0x124/0x1dc) [<c02c6408>] (bus_add_driver) from [<c02c7ac0>] (driver_register+0x78/0xf8) [<c02c7ac0>] (driver_register) from [<c000888c>] (do_one_initcall+0x80/0x1cc) [<c000888c>] (do_one_initcall) from [<c0733618>] (kernel_init_freeable+0xe4/0x1b4) [<c0733618>] (kernel_init_freeable) from [<c058db9c>] (kernel_init+0xc/0xec) [<c058db9c>] (kernel_init) from [<c0009850>] (ret_from_fork+0x14/0x24) [...] This bug was introduced by commit 588a6a99286ae30afb1339d8bc2163517b1b7dd1 ("leds: netxbig: fix attribute-creation race"). Signed-off-by: Simon Guinot <simon.guinot@sequanux.org> Cc: <stable@vger.kernel.org> # 3.17+ Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2015-01-13tipc: remove redundant timer defined in tipc_sock structYing Xue
Remove the redundant timer defined in tipc_sock structure, instead we can directly reuse the sk_timer defined in sock structure. Signed-off-by: Ying Xue <ying.xue@windriver.com> Acked-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13net/fsl: replace (1 << x) with BIT(x) for bit definitions in xgmac_mdioShaohui Xie
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13net/fsl: fix a bug in xgmac_mdioShaohui Xie
There is a bug in xgmac_mdio_read when clear the bit MDIO_STAT_ENC, which '&' is missed in 'mdio_stat &= ~MDIO_STAT_ENC'. Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13bridge: fix uninitialized variable warningRoopa Prabhu
net/bridge/br_netlink.c: In function ‘br_fill_ifinfo’: net/bridge/br_netlink.c:146:32: warning: ‘vid_range_flags’ may be used uninitialized in this function [-Wmaybe-uninitialized] err = br_fill_ifvlaninfo_range(skb, vid_range_start, ^ net/bridge/br_netlink.c:108:6: note: ‘vid_range_flags’ was declared here u16 vid_range_flags; Reported-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13ipv6: directly include libc-compat.h in ipv6.hWillem de Bruijn
Patch 3b50d9029809 ("ipv6: fix redefinition of in6_pktinfo ...") fixed a libc compatibility issue in ipv6 structure definitions as described in include/uapi/linux/libc-compat.h. It relies on including linux/in6.h to include libc-compat.h itself. Include that file directly to clearly communicate the dependency (libc-compat.h: "This include must be as early as possible"). Signed-off-by: Willem de Bruijn <willemb@google.com> ---- As discussed in http://patchwork.ozlabs.org/patch/427384/ Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13cxgb4vf: Initialize mdio_addr before using itHariprasad Shenai
In commit 5ad24def21b205a8 ("cxgb4vf: Fix ethtool get_settings for VF driver") mdio_addr of port_info structure was used unininitialzed. Fixing it. Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next Jeff Kirsher says: ==================== Intel Wired LAN Driver Updates 2015-01-13 This series contains updates to i40e and i40evf. Mitch provides a fix for i40e to move the call to pci_disable_sriov() so that it is called earlier to ensure that the PF driver won't free VF resources before the VF remove routine can complete. Also cleans up redundant and duplicate code in the i40evf. Refactors the i40evf shutdown code and let the watchdog take care of shutting things down. Fix a possible memory leak, if we are using VLANs and the communication with the PF fail during shutdown. On some versions of the firmware, the VF admin send queue may become stalled. In this case, the easiest solution is to place another descriptor on the queue and the firmware will then process both requests. Greg adds a warning when the NPAR enabled partitions detected a link speed less than 10 Gpbs. Vasu removes redundant VN2VN MAC address which were already added by the FCoE stack. Shannon adds code to find how many partitions there are per port and what is the current partition_id when in NPAR mode. In multifunction mode, make sure we only allow SR/IOV on the master PF of a port and only allow partition 1 to set WoL, speed and flow control. Kamil adds code to read the PBA block from shadow RAM and returns the part number in a string format. Catherine provides a fix to check if link state and link speed has changed before exiting link event v2: remove un-needed {} in patch #3 of the series based on feedback from Sergei Shtylyov ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13i40e: limit sriov to partition 1 of NPAR configurationsShannon Nelson
Make sure we only allow SR/IOV on the master PF of a port in multifunction mode. This should be the case anyway based on the num_vfs configured in the NVM, but this will help make sure there's no question. If we're not in multifunction mode the partition_id will always be 1. Change-ID: I8b2592366fe6782f15301bde2ebd1d4da240109d Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Tested-by: Jim Young <james.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e: Don't exit link event early if link speed has changedCatherine Sullivan
Previously we were only checking if the link up state had changed, and if it hadn't exiting the link event routine early. We should also check if speed has changed, and if it has, stay and finish processing the link event. Change-ID: I9c8e0991b3f0279108a7858898c3c5ce0a9856b8 Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e: limit WoL and link settings to partition 1Shannon Nelson
When in multi-function mode, e.g. Dell's NPAR, only partition 1 of each MAC is allowed to set WoL, speed, and flow control. Change-ID: I87a9debc7479361c55a71f0120294ea319f23588 Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e: Adding function for reading PBA StringKamil Krawczyk
Function will read PBA Block from Shadow RAM and return it in a string format. Change-ID: I4ee7059f6e21bd0eba38687da15e772e0b4ab36e Signed-off-by: Kamil Krawczyk <kamil.krawczyk@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e/i40evf: find partition_id in npar modeShannon Nelson
When in NPAR mode the driver instance might be controlling the base partition or one of the other "fake" PFs. There are some things that can only be done by the base partition, aka partition_id 1. This code does a bit of work to find how many partitions are there per port and what is the current partition_id. Change-ID: Iba427f020a1983d02147d86f121b3627e20ee21d Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e: remove VN2VN related mac filtersVasu Dev
These mac address already added by FCoE stack above netdev, therefore adding them here is redundant. Change-ID: Ia5b59f426f57efd20f8945f7c6cc5d741fbe06e5 Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e: Add warning for NPAR partitions with link speed less than 10GbpsGreg Rose
NPAR enabled partitions should warn the user when detected link speed is less than 10Gpbs. Change-ID: I7728bb8ce279bf0f4f755d78d7071074a4eb5f69 Signed-off-by: Greg Rose <gregory.v.rose@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40evf: kick a stalled admin queueMitch A Williams
On some versions of the firmware, the VF admin send queue may become stalled. In this case, the easiest solution is to just place another descriptor on the queue; the firmware will then process both requests. The early init code already accounts for this, but the runtime code does not. In the watchdog task, check for the stall condition, and if it's found, send our API version to the PF. When the PF replies, just ignore the reply. Change-ID: I380d78185a4f284d649c44d263e648afc9b4d50c Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40evf: enable interrupt 0 appropriatelyMitch A Williams
Don't enable vector 0 in the ISR, just schedule the adminq task and let it enable the vector. This prevents the task from being called reentrantly. Make sure that the vector is enabled on all exit paths of the adminq task, including error exits. Change-ID: I53f3d14f91ed7a9e90291ea41c681122a5eca5b5 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40evf: don't fire traffic IRQs when the interface is downMitch A Williams
There is always a possibility that MSI-X interrupts can get lost. To keep this problem from stalling the driver, we fire all of our MSI-X vectors during the watchdog routine. However, we should not fire the traffic vectors when the interface is closed. In this case, just fire vector 0, which is used for admin queue events. As a result, we do not enable the interrupt cause for vector 0. This can cause the admin queue handler to be called reentrantly, which causes a scary "critical section violation" message to be logged, even though no real damage is done. Change-ID: Ic43a5184708ab2cb9a23fca7dedd808a46717795 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40evf: remove leftover VLAN filtersMitch A Williams
If we're using VLANs and communications with the PF fail during shutdown, we will leak memory because not all of the VLAN filters will be removed. To eliminate this possibility, go through the list again right before the module is removed and delete any leftover entries. Change-ID: Id3b5315c47ca0a61ae123a96ff345d010bc41aed Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Tested-by: Jim Young <james.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40evf: refactor shutdown codeMitch A Williams
If the VF driver is running in the host, the shutdown code is completely broken. We cannot wait in our down routine for the PF to respond to our requests, as its admin queue task will never run while we hold the lock. Instead, we schedule operations, then let the watchdog take care of shutting things down. If the driver is being removed, then wait in the remove routine until the watchdog is done before continuing. Change-ID: I93a58d17389e8d6b58f21e430b56ed7b4590b2c5 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)Christian Borntraeger
Feedback has shown that WRITE_ONCE(x, val) is easier to use than ASSIGN_ONCE(val,x). There are no in-tree users yet, so lets change it for 3.19. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Davidlohr Bueso <dave@stgolabs.net> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2015-01-13openvswitch: Remove unnecessary version.h inclusionSyam Sidhardhan
version.h inclusion is not necessary as detected by versioncheck. Signed-off-by: Syam Sidhardhan <s.syam@samsung.com> Acked-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13i40evf: Remove some scary log messagesMitch A Williams
These messages may be triggered during normal init of the driver if the PF or FW take a long time to respond. There's nothing really wrong, so don't freak people out logging messages. If the communication channel really is dead, then we'll retry a few times and give up. This will log a different more scary message that should cause consternation. This allows the user to more easily detect a genuine failure. Change-ID: I6e2b758d4234a3a09c1015c82c8f2442a697cbdb Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Tested-by: Jim Young <james.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40evf: remove redundant codeMitch A Williams
These functions are redundant and duplicate functionality found in i40evf_free_all_[tx|rx]_resources. Change-ID: Ia199908926d7a1a4b8247f75f89b5da24c9b149c Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Tested-by: Jim Young <james.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13i40e: disable IOV before freeing resourcesMitch A Williams
If VF drivers are loaded in the host OS, the call to pci_disable_sriov() will cause these drivers' remove routines to be called. If the PF driver has already freed VF resources before this happens, then the VF remove routine can't properly communicate with the PF driver causing all sorts of mayhem and error messages and hurt feelings. To fix this, we move the call to pci_disable_sriov() up to the top of the function and let it complete before freeing any VF resources. Change-ID: I397c3997a00f6408e32b7735273911e499600236 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Tested-by: Jim Young <james.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-13tcp: avoid reducing cwnd when ACK+DSACK is receivedSébastien Barré
With TLP, the peer may reply to a probe with an ACK+D-SACK, with ack value set to tlp_high_seq. In the current code, such ACK+DSACK will be missed and only at next, higher ack will the TLP episode be considered done. Since the DSACK is not present anymore, this will cost a cwnd reduction. This patch ensures that this scenario does not cause a cwnd reduction, since receiving an ACK+DSACK indicates that both the initial segment and the probe have been received by the peer. The following packetdrill test, from Neal Cardwell, validates this patch: // Establish a connection. 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0 bind(3, ..., ...) = 0 +0 listen(3, 1) = 0 +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 6> +.020 < . 1:1(0) ack 1 win 257 +0 accept(3, ..., ...) = 4 // Send 1 packet. +0 write(4, ..., 1000) = 1000 +0 > P. 1:1001(1000) ack 1 // Loss probe retransmission. // packets_out == 1 => schedule PTO in max(2*RTT, 1.5*RTT + 200ms) // In this case, this means: 1.5*RTT + 200ms = 230ms +.230 > P. 1:1001(1000) ack 1 +0 %{ assert tcpi_snd_cwnd == 10 }% // Receiver ACKs at tlp_high_seq with a DSACK, // indicating they received the original packet and probe. +.020 < . 1:1(0) ack 1001 win 257 <sack 1:1001,nop,nop> +0 %{ assert tcpi_snd_cwnd == 10 }% // Send another packet. +0 write(4, ..., 1000) = 1000 +0 > P. 1001:2001(1000) ack 1 // Receiver ACKs above tlp_high_seq, which should end the TLP episode // if we haven't already. We should not reduce cwnd. +.020 < . 1:1(0) ack 2001 win 257 +0 %{ assert tcpi_snd_cwnd == 10, tcpi_snd_cwnd }% Credits: -Gregory helped in finding that tcp_process_tlp_ack was where the cwnd got reduced in our MPTCP tests. -Neal wrote the packetdrill test above -Yuchung reworked the patch to make it more readable. Cc: Gregory Detal <gregory.detal@uclouvain.be> Cc: Nandita Dukkipati <nanditad@google.com> Tested-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Yuchung Cheng <ycheng@google.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Sébastien Barré <sebastien.barre@uclouvain.be> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14Merge tag 'linux-kselftest-3.19-rc-5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest fixes from Shuah Khan: "This update contains three patches to fix one compile error, and two run-time bugs. One of them fixes infinite loop on ARM" * tag 'linux-kselftest-3.19-rc-5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests/vm: fix link error for transhuge-stress test tools: testing: selftests: mq_perf_tests: Fix infinite loop on ARM selftests/exec: allow shell return code of 126
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