1. 23 Feb, 2011 3 commits
  2. 22 Feb, 2011 9 commits
  3. 21 Feb, 2011 5 commits
    • Christian Lamparter's avatar
      p54pci: update receive dma buffers before and after processing · 0bf719df
      Christian Lamparter authored
      Documentation/DMA-API-HOWTO.txt states:
      
      "DMA transfers need to be synced properly in order for
      the cpu and device to see the most uptodate and correct
      copy of the DMA buffer."
      
      Cc: <stable@kernel.org>
      Signed-off-by: default avatarChristian Lamparter <chunkeey@googlemail.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      0bf719df
    • Daniel J Blueman's avatar
      fix cfg80211_wext_siwfreq lock ordering... · 4f919a3b
      Daniel J Blueman authored
      I previously managed to reproduce a hang while scanning wireless
      channels (reproducible with airodump-ng hopping channels); subsequent
      lockdep instrumentation revealed a lock ordering issue.
      
      Without knowing the design intent, it looks like the locks should be
      taken in reverse order; please comment.
      
      =======================================================
      [ INFO: possible circular locking dependency detected ]
      2.6.38-rc5-341cd #4
      -------------------------------------------------------
      airodump-ng/15445 is trying to acquire lock:
       (&rdev->devlist_mtx){+.+.+.}, at: [<ffffffff816b1266>]
      cfg80211_wext_siwfreq+0xc6/0x100
      
      but task is already holding lock:
       (&wdev->mtx){+.+.+.}, at: [<ffffffff816b125c>] cfg80211_wext_siwfreq+0xbc/0x100
      
      which lock already depends on the new lock.
      
      the existing dependency chain (in reverse order) is:
      
      -> #1 (&wdev->mtx){+.+.+.}:
             [<ffffffff810a79d6>] lock_acquire+0xc6/0x280
             [<ffffffff816d6bce>] mutex_lock_nested+0x6e/0x4b0
             [<ffffffff81696080>] cfg80211_netdev_notifier_call+0x430/0x5f0
             [<ffffffff8109351b>] notifier_call_chain+0x8b/0x100
             [<ffffffff810935b1>] raw_notifier_call_chain+0x11/0x20
             [<ffffffff81576d92>] call_netdevice_notifiers+0x32/0x60
             [<ffffffff815771a4>] __dev_notify_flags+0x34/0x80
             [<ffffffff81577230>] dev_change_flags+0x40/0x70
             [<ffffffff8158587c>] do_setlink+0x1fc/0x8d0
             [<ffffffff81586042>] rtnl_setlink+0xf2/0x140
             [<ffffffff81586923>] rtnetlink_rcv_msg+0x163/0x270
             [<ffffffff8159d741>] netlink_rcv_skb+0xa1/0xd0
             [<ffffffff815867b0>] rtnetlink_rcv+0x20/0x30
             [<ffffffff8159d39a>] netlink_unicast+0x2ba/0x300
             [<ffffffff8159dd57>] netlink_sendmsg+0x267/0x3e0
             [<ffffffff8155e364>] sock_sendmsg+0xe4/0x110
             [<ffffffff8155f3a3>] sys_sendmsg+0x253/0x3b0
             [<ffffffff81003192>] system_call_fastpath+0x16/0x1b
      
      -> #0 (&rdev->devlist_mtx){+.+.+.}:
             [<ffffffff810a7222>] __lock_acquire+0x1622/0x1d10
             [<ffffffff810a79d6>] lock_acquire+0xc6/0x280
             [<ffffffff816d6bce>] mutex_lock_nested+0x6e/0x4b0
             [<ffffffff816b1266>] cfg80211_wext_siwfreq+0xc6/0x100
             [<ffffffff816b2fad>] ioctl_standard_call+0x5d/0xd0
             [<ffffffff816b3223>] T.808+0x163/0x170
             [<ffffffff816b326a>] wext_handle_ioctl+0x3a/0x90
             [<ffffffff815798d2>] dev_ioctl+0x6f2/0x830
             [<ffffffff8155cf3d>] sock_ioctl+0xfd/0x290
             [<ffffffff8117dffd>] do_vfs_ioctl+0x9d/0x590
             [<ffffffff8117e53a>] sys_ioctl+0x4a/0x80
             [<ffffffff81003192>] system_call_fastpath+0x16/0x1b
      
      other info that might help us debug this:
      
      2 locks held by airodump-ng/15445:
       #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff81586782>] rtnl_lock+0x12/0x20
       #1:  (&wdev->mtx){+.+.+.}, at: [<ffffffff816b125c>]
      cfg80211_wext_siwfreq+0xbc/0x100
      
      stack backtrace:
      Pid: 15445, comm: airodump-ng Not tainted 2.6.38-rc5-341cd #4
      Call Trace:
       [<ffffffff810a3f0a>] ? print_circular_bug+0xfa/0x100
       [<ffffffff810a7222>] ? __lock_acquire+0x1622/0x1d10
       [<ffffffff810a1f99>] ? trace_hardirqs_off_caller+0x29/0xc0
       [<ffffffff810a79d6>] ? lock_acquire+0xc6/0x280
       [<ffffffff816b1266>] ? cfg80211_wext_siwfreq+0xc6/0x100
       [<ffffffff810a31d7>] ? mark_held_locks+0x67/0x90
       [<ffffffff816d6bce>] ? mutex_lock_nested+0x6e/0x4b0
       [<ffffffff816b1266>] ? cfg80211_wext_siwfreq+0xc6/0x100
       [<ffffffff810a31d7>] ? mark_held_locks+0x67/0x90
       [<ffffffff816b1266>] ? cfg80211_wext_siwfreq+0xc6/0x100
       [<ffffffff816b1266>] ? cfg80211_wext_siwfreq+0xc6/0x100
       [<ffffffff816b2fad>] ? ioctl_standard_call+0x5d/0xd0
       [<ffffffff8157818b>] ? __dev_get_by_name+0x9b/0xc0
       [<ffffffff816b2f50>] ? ioctl_standard_call+0x0/0xd0
       [<ffffffff816b3223>] ? T.808+0x163/0x170
       [<ffffffff8112ddf2>] ? might_fault+0x72/0xd0
       [<ffffffff816b326a>] ? wext_handle_ioctl+0x3a/0x90
       [<ffffffff8112de3b>] ? might_fault+0xbb/0xd0
       [<ffffffff815798d2>] ? dev_ioctl+0x6f2/0x830
       [<ffffffff810a1bae>] ? put_lock_stats+0xe/0x40
       [<ffffffff810a1c8c>] ? lock_release_holdtime+0xac/0x150
       [<ffffffff8155cf3d>] ? sock_ioctl+0xfd/0x290
       [<ffffffff8117dffd>] ? do_vfs_ioctl+0x9d/0x590
       [<ffffffff8116c8ff>] ? fget_light+0x1df/0x3c0
       [<ffffffff8117e53a>] ? sys_ioctl+0x4a/0x80
       [<ffffffff81003192>] ? system_call_fastpath+0x16/0x1b
      Signed-off-by: default avatarDaniel J Blueman <daniel.blueman@gmail.com>
      Acked-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      4f919a3b
    • Gertjan van Wingerde's avatar
      rt2x00: Fix WPA TKIP Michael MIC failures. · a866a2cc
      Gertjan van Wingerde authored
      As reported and found by Johannes Stezenbach:
      rt2800{pci,usb} do not report the Michael MIC in RXed frames, but do check
      the Michael MIC in hardware. Therefore we have to report to mac80211 that the
      received frame does not include the Michael MIC.
      
      https://bugzilla.kernel.org/show_bug.cgi?id=16608Signed-off-by: default avatarGertjan van Wingerde <gwingerde@gmail.com>
      Signed-off-by: default avatarIvo van Doorn <IvDoorn@gmail.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      a866a2cc
    • Nick Kossifidis's avatar
      ath5k: Fix fast channel switching · 573cfde7
      Nick Kossifidis authored
      Fast channel change fixes:
      
      a) Always set OFDM timings
      b) Don't re-activate PHY
      c) Enable only NF calibration, not AGC
      
      https://bugzilla.kernel.org/show_bug.cgi?id=27382Signed-off-by: default avatarNick Kossifidis <mickflemm@gmail.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      573cfde7
    • Yuchung Cheng's avatar
      tcp: undo_retrans counter fixes · c24f691b
      Yuchung Cheng authored
      Fix a bug that undo_retrans is incorrectly decremented when undo_marker is
      not set or undo_retrans is already 0. This happens when sender receives
      more DSACK ACKs than packets retransmitted during the current
      undo phase. This may also happen when sender receives DSACK after
      the undo operation is completed or cancelled.
      
      Fix another bug that undo_retrans is incorrectly incremented when
      sender retransmits an skb and tcp_skb_pcount(skb) > 1 (TSO). This case
      is rare but not impossible.
      Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
      Acked-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c24f691b
  4. 20 Feb, 2011 5 commits
  5. 18 Feb, 2011 17 commits
  6. 17 Feb, 2011 1 commit