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[Emmanuel Grumbach <egrumbach@xxxxxxxxx>]

Please test the patch attached

** Patch added: "0001-iwlwifi-dvm-drop-non-VO-frames-when-flushing.patch"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1360597/+attachment/4225152/+files/0001-iwlwifi-dvm-drop-non-VO-frames-when-flushing.patch

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https://bugs.launchpad.net/bugs/1360597

Title:
  iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Attach: dmesg_3.16.0-10-generic.txt

  [59313.747024] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
  [59313.747032] iwlwifi 0000:01:00.0: Current SW read_ptr 36 write_ptr 63
  [59313.747076] iwl data: 00000000: 00 00 00 00 00 00 00 00 f0 ff 0f 00 00 00 00 00  ................
  [59313.747092] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x00000000
  [59313.747109] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x80102033
  [59313.747125] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
  [59313.747141] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x80300029
  [59313.747158] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
  [59313.747173] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
  [59313.747187] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
  [59313.747202] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x00709032
  [59313.747261] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [42,42]
  [59313.747321] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  [59313.747380] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [36,63]
  [59313.747436] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.747493] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.747549] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
  [59313.747605] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  [59313.747660] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  [59313.747716] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
  [59313.747773] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [51,51]
  [59313.747828] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  [59313.747885] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.747942] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.747999] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.748055] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.748112] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.748169] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.748225] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.748281] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59313.748338] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.754483] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
  [59315.754505] iwlwifi 0000:01:00.0: Current SW read_ptr 68 write_ptr 163
  [59315.754532] iwl data: 00000000: f0 0f 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  [59315.754547] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x00000000
  [59315.754561] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x8010204b
  [59315.754575] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
  [59315.754590] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x8030002a
  [59315.754605] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
  [59315.754619] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
  [59315.754633] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
  [59315.754647] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x00709035
  [59315.754704] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [43,43]
  [59315.754762] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  [59315.754818] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [68,163]
  [59315.754875] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.754931] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.754988] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
  [59315.755043] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  [59315.755100] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  [59315.755156] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
  [59315.755213] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [54,54]
  [59315.755269] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  [59315.755326] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755382] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755438] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755495] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755551] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755608] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755665] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755721] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.755777] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [59315.759740] cfg80211: Calling CRDA to update world regulatory domain
  [59315.897788] cfg80211: World regulatory domain updated:
  [59315.897796] cfg80211:  DFS Master region: unset
  [59315.897799] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
  [59315.897807] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  [59315.897811] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  [59315.897815] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
  [59315.897818] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  [59315.897822] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-10-generic 3.16.0-10.15
  ProcVersionSignature: Ubuntu 3.16.0-10.15-generic 3.16.1
  Uname: Linux 3.16.0-10-generic x86_64
  ApportVersion: 2.14.6-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D3p:   caravena   2857 F...m pulseaudio
   /dev/snd/controlC0:  caravena   2857 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sat Aug 23 09:03:57 2014
  HibernationDevice: RESUME=UUID=360bd2d2-4f44-4311-86d6-4781ac81ee87
  InstallationDate: Installed on 2014-04-27 (118 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 530U3C/530U4C
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-10-generic root=UUID=13144268-2374-4154-83f1-c35d81306190 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-10-generic N/A
   linux-backports-modules-3.16.0-10-generic  N/A
   linux-firmware                             1.132
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/15/2013
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P14AAJ
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: SAMSUNG_NP1234567890
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP14AAJ:bd04/15/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn530U3C/530U4C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 530U3C/530U4C
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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