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  1. Jun 06, 2011
    • Stanislaw Gruszka's avatar
      rt2x00: fix rmmod crash · 3bb42a64
      Stanislaw Gruszka authored
      
      Avoid queue and run autowakeup_work when device is not present anymore.
      That prevent rmmod and device remove crash introduced by:
      
      commit 1c0bcf89
      Author: Ivo van Doorn <ivdoorn@gmail.com>
      Date:   Sat Apr 30 17:18:18 2011 +0200
      
          rt2x00: Add autowake support for USB hardware
      
      Signed-off-by: default avatarStanislaw Gruszka <stf_xl@wp.pl>
      Acked-by: default avatarIvo van Doorn <IvDoorn@gmail.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      3bb42a64
    • Stanislaw Gruszka's avatar
      iwlagn: use cts-to-self protection on 5000 adapters series · 42b70a5f
      Stanislaw Gruszka authored
      
      This patch fixes 802.11n stability and performance regression we have
      since 2.6.35. It boost performance on my 5GHz N-only network from about
      5MB/s to 8MB/s. Similar percentage boost can be observed on 2.4 GHz.
      
      These are test results of 5x downloading of approximately 700MB iso
      image:
      
      vanilla: 5.27 5.22 4.94 4.47 5.31 ; avr 5.0420 std 0.35110
      patched: 8.07 7.95 8.06 7.99 7.96 ; avr 8.0060 std 0.055946
      
      This was achieved with NetworkManager configured to do not perform
      periodical scans, by configuring constant BSSID. With periodical scans,
      after some time, performance downgrade to unpatched driver level, like
      in example below:
      
      patched: 7.40 7.61 4.28 4.37 4.80 avr 5.6920 std 1.6683
      
      However patch still make better here, since similar test on unpatched
      driver make link disconnects with below messages after some time:
      
      wlan1: authenticate with 00:23:69:35:d1:3f (try 1)
      wlan1: authenticate with 00:23:69:35:d1:3f (try 2)
      wlan1: authenticate with 00:23:69:35:d1:3f (try 3)
      wlan1: authentication with 00:23:69:35:d1:3f timed out
      
      On 2.6.35 kernel patch helps against connection hangs with messages:
      
      iwlagn 0000:20:00.0: queue 10 stuck 3 time. Fw reload.
      iwlagn 0000:20:00.0: On demand firmware reload
      iwlagn 0000:20:00.0: Stopping AGG while state not ON or starting
      
      Cc: stable@kernel.org # 2.6.35+
      Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
      Acked-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      42b70a5f
  2. Jun 03, 2011
  3. Jun 01, 2011
  4. May 31, 2011
  5. May 27, 2011
  6. May 26, 2011
  7. May 25, 2011
    • Flavio Leitner's avatar
      bonding: documentation and code cleanup for resend_igmp · 94265cf5
      Flavio Leitner authored
      
      Improves the documentation about how IGMP resend parameter
      works, fix two missing checks and coding style issues.
      
      Signed-off-by: default avatarFlavio Leitner <fbl@redhat.com>
      Acked-by: default avatarRick Jones <rick.jones2@hp.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      94265cf5
    • Neil Horman's avatar
      bonding: prevent deadlock on slave store with alb mode (v3) · 9fe0617d
      Neil Horman authored
      
      This soft lockup was recently reported:
      
      [root@dell-per715-01 ~]# echo +bond5 > /sys/class/net/bonding_masters
      [root@dell-per715-01 ~]# echo +eth1 > /sys/class/net/bond5/bonding/slaves
      bonding: bond5: doing slave updates when interface is down.
      bonding bond5: master_dev is not up in bond_enslave
      [root@dell-per715-01 ~]# echo -eth1 > /sys/class/net/bond5/bonding/slaves
      bonding: bond5: doing slave updates when interface is down.
      
      BUG: soft lockup - CPU#12 stuck for 60s! [bash:6444]
      CPU 12:
      Modules linked in: bonding autofs4 hidp rfcomm l2cap bluetooth lockd sunrpc
      be2d
      Pid: 6444, comm: bash Not tainted 2.6.18-262.el5 #1
      RIP: 0010:[<ffffffff80064bf0>]  [<ffffffff80064bf0>]
      .text.lock.spinlock+0x26/00
      RSP: 0018:ffff810113167da8  EFLAGS: 00000286
      RAX: ffff810113167fd8 RBX: ffff810123a47800 RCX: 0000000000ff1025
      RDX: 0000000000000000 RSI: ffff810123a47800 RDI: ffff81021b57f6f8
      RBP: ffff81021b57f500 R08: 0000000000000000 R09: 000000000000000c
      R10: 00000000ffffffff R11: ffff81011d41c000 R12: ffff81021b57f000
      R13: 0000000000000000 R14: 0000000000000282 R15: 0000000000000282
      FS:  00002b3b41ef3f50(0000) GS:ffff810123b27940(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
      CR2: 00002b3b456dd000 CR3: 000000031fc60000 CR4: 00000000000006e0
      
      Call Trace:
       [<ffffffff80064af9>] _spin_lock_bh+0x9/0x14
       [<ffffffff886937d7>] :bonding:tlb_clear_slave+0x22/0xa1
       [<ffffffff8869423c>] :bonding:bond_alb_deinit_slave+0xba/0xf0
       [<ffffffff8868dda6>] :bonding:bond_release+0x1b4/0x450
       [<ffffffff8006457b>] __down_write_nested+0x12/0x92
       [<ffffffff88696ae4>] :bonding:bonding_store_slaves+0x25c/0x2f7
       [<ffffffff801106f7>] sysfs_write_file+0xb9/0xe8
       [<ffffffff80016b87>] vfs_write+0xce/0x174
       [<ffffffff80017450>] sys_write+0x45/0x6e
       [<ffffffff8005d28d>] tracesys+0xd5/0xe0
      
      It occurs because we are able to change the slave configuarion of a bond while
      the bond interface is down.  The bonding driver initializes some data structures
      only after its ndo_open routine is called.  Among them is the initalization of
      the alb tx and rx hash locks.  So if we add or remove a slave without first
      opening the bond master device, we run the risk of trying to lock/unlock a
      spinlock that has garbage for data in it, which results in our above softlock.
      
      Note that sometimes this works, because in many cases an unlocked spinlock has
      the raw_lock parameter initialized to zero (meaning that the kzalloc of the
      net_device private data is equivalent to calling spin_lock_init), but thats not
      true in all cases, and we aren't guaranteed that condition, so we need to pass
      the relevant spinlocks through the spin_lock_init function.
      
      Fix it by moving the spin_lock_init calls for the tx and rx hashtable locks to
      the ndo_init path, so they are ready for use by the bond_store_slaves path.
      
      Change notes:
      v2) Based on conversation with Jay and Nicolas it seems that the ability to
      enslave devices while the bond master is down should be safe to do.  As such
      this is an outlier bug, and so instead we'll just initalize the errant spinlocks
      in the init path rather than the open path, solving the problem.  We'll also
      remove the warnings about the bond being down during enslave operations, since
      it should be safe
      
      v3) Fix spelling error
      
      Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
      Reported-by: default avatar <jtluka@redhat.com>
      CC: Jay Vosburgh <fubar@us.ibm.com>
      CC: Andy Gospodarek <andy@greyhouse.net>
      CC: nicolas.2p.debian@gmail.com
      CC: "David S. Miller" <davem@davemloft.net>
      Signed-off-by: default avatarJay Vosburgh <fubar@us.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9fe0617d
    • Meelis Roos's avatar
      Add Fujitsu 1000base-SX PCI ID to tg3 · 1dcb14d9
      Meelis Roos authored
      
      This patch adds the PCI ID of Fujitsu 1000base-SX NIC to tg3 driver.
      Tested to detect the card, MAC and serdes, not tested with link at the
      moment since I have no fiber switch here. I did not add new constants to
      the pci_ids.h header file since these constants are used only here.
      
      Signed-off-by: default avatarMeelis Roos <mroos@linux.ee>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1dcb14d9
    • Dmitry Kravkov's avatar
    • Ulrich Hecht's avatar
      via-velocity: don't annotate MAC registers as packed · d10358de
      Ulrich Hecht authored
      On ARM, memory accesses through packed pointers behave in unexpected
      ways in GCC releases 4.3 and higher; see https://lkml.org/lkml/2011/2/2/163
      
      
      for discussion.
      
      In this particular case, 32-bit I/O registers are accessed bytewise,
      causing incorrect setting of the DMA address registers which in turn
      leads to an error interrupt storm that brings the system to a halt.
      
      Since the mac_regs structure does not need any packing anyway, this patch
      simply removes the attribute to fix the issue.
      
      Signed-off-by: default avatarUlrich Hecht <uli@suse.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d10358de
    • Ian Campbell's avatar
      xen: netfront: hold RTNL when updating features. · 1ba37c51
      Ian Campbell authored
      
      Konrad reports:
      [    0.930811] RTNL: assertion failed at /home/konrad/ssd/linux/net/core/dev.c (5258)
      [    0.930821] Pid: 22, comm: xenwatch Not tainted 2.6.39-05193-gd762f43 #1
      [    0.930825] Call Trace:
      [    0.930834]  [<ffffffff8143bd0e>] __netdev_update_features+0xae/0xe0
      [    0.930840]  [<ffffffff8143dd41>] netdev_update_features+0x11/0x30
      [    0.930847]  [<ffffffffa0037105>] netback_changed+0x4e5/0x800 [xen_netfront]
      [    0.930854]  [<ffffffff8132a838>] xenbus_otherend_changed+0xa8/0xb0
      [    0.930860]  [<ffffffff8157ca99>] ? _raw_spin_unlock_irqrestore+0x19/0x20
      [    0.930866]  [<ffffffff8132adfe>] backend_changed+0xe/0x10
      [    0.930871]  [<ffffffff8132875a>] xenwatch_thread+0xba/0x180
      [    0.930876]  [<ffffffff810a8ba0>] ? wake_up_bit+0x40/0x40
      [    0.930881]  [<ffffffff813286a0>] ? split+0xf0/0xf0
      [    0.930886]  [<ffffffff810a8646>] kthread+0x96/0xa0
      [    0.930891]  [<ffffffff815855a4>] kernel_thread_helper+0x4/0x10
      [    0.930896]  [<ffffffff815846b3>] ? int_ret_from_sys_call+0x7/0x1b
      [    0.930901]  [<ffffffff8157cf61>] ? retint_restore_args+0x5/0x6
      [    0.930906]  [<ffffffff815855a0>] ? gs_change+0x13/0x13
      
      This update happens in xenbus watch callback context and hence does not already
      hold the rtnl. Take the lock as necessary.
      
      Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
      Tested-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1ba37c51
  8. May 24, 2011
  9. May 23, 2011
  10. May 22, 2011
    • Paul Gortmaker's avatar
      Add appropriate <linux/prefetch.h> include for prefetch users · 70c71606
      Paul Gortmaker authored
      
      After discovering that wide use of prefetch on modern CPUs
      could be a net loss instead of a win, net drivers which were
      relying on the implicit inclusion of prefetch.h via the list
      headers showed up in the resulting cleanup fallout.  Give
      them an explicit include via the following $0.02 script.
      
       =========================================
       #!/bin/bash
       MANUAL=""
       for i in `git grep -l 'prefetch(.*)' .` ; do
       	grep -q '<linux/prefetch.h>' $i
       	if [ $? = 0 ] ; then
       		continue
       	fi
      
       	(	echo '?^#include <linux/?a'
       		echo '#include <linux/prefetch.h>'
       		echo .
       		echo w
       		echo q
       	) | ed -s $i > /dev/null 2>&1
       	if [ $? != 0 ]; then
       		echo $i needs manual fixup
       		MANUAL="$i $MANUAL"
       	fi
       done
       echo ------------------- 8\<----------------------
       echo vi $MANUAL
       =========================================
      
      Signed-off-by: default avatarPaul <paul.gortmaker@windriver.com>
      [ Fixed up some incorrect #include placements, and added some
        non-network drivers and the fib_trie.c case    - Linus ]
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      70c71606
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