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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1240038

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1240038

Title:
  imx6: sata fixes

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  SRU Justification:

  Impact:

  /dev/sda doesn't show up on imx6 board and while support for the sata controller was submitted upstream[1], we were missing a dts snippet that didn't make the 3.11 window (but entered as part of 3.12, thus i cherry-picked plus some mechanical 
  modification to make it apply).

  Moreover, building this driver as a module triggers an error when
  loading:

  [    3.447345] sysfs: cannot create duplicate filename '/bus/platform/devices/ahci'
  [    3.454799] Modules linked in: ahci_imx(F+) xor(F+) zlib_deflate(F) libcrc32c(F)
  [    3.462343] CPU: 0 PID: 193 Comm: modprobe Tainted: GF            3.11.0-13-generic #20~imx6sata
  [    3.471223] [<c001dd70>] (unwind_backtrace+0x0/0x138) from [<c00184dc>] (show_stack+0x10/0x14)
  [    3.479916] [<c00184dc>] (show_stack+0x10/0x14) from [<c065c710>] (dump_stack+0x74/0x90)
  [    3.488040] [<c065c710>] (dump_stack+0x74/0x90) from [<c004e2fc>] (warn_slowpath_common+0x68/0x8c)
  [    3.497066] [<c004e2fc>] (warn_slowpath_common+0x68/0x8c) from [<c004e3b4>] (warn_slowpath_fmt+0x30/0x40)
  [    3.498634]    32regs    :   709.200 MB/sec
  [    3.498640] xor: using function: arm4regs (1087.600 MB/sec)
  [    3.516510] [<c004e3b4>] (warn_slowpath_fmt+0x30/0x40) from [<c01a901c>] (sysfs_add_one+0x84/0xa4)
  [    3.525557] [<c01a901c>] (sysfs_add_one+0x84/0xa4) from [<c01a9c20>] (sysfs_do_create_link_sd+0xd0/0x200)
  [    3.535207] [<c01a9c20>] (sysfs_do_create_link_sd+0xd0/0x200) from [<c03bb5a8>] (bus_add_device+0xc4/0x17c)
  [    3.545004] [<c03bb5a8>] (bus_add_device+0xc4/0x17c) from [<c03b98d8>] (device_add+0x38c/0x668)
  [    3.553770] [<c03b98d8>] (device_add+0x38c/0x668) from [<c03bdc3c>] (platform_device_add+0xbc/0x258)
  [    3.562958] [<c03bdc3c>] (platform_device_add+0xbc/0x258) from [<bf01234c>] (imx_ahci_probe+0x17c/0x1e8 [ahci_imx])
  [    3.573456] [<bf01234c>] (imx_ahci_probe+0x17c/0x1e8 [ahci_imx]) from [<c03bd7a8>] (platform_drv_probe+0x18/0x1c)
  [    3.583774] [<c03bd7a8>] (platform_drv_probe+0x18/0x1c) from [<c03bc378>] (driver_probe_device+0x130/0x374)
  [    3.593562] [<c03bc378>] (driver_probe_device+0x130/0x374) from [<c03ba718>] (bus_for_each_drv+0x44/0x8c)
  [    3.603174] [<c03ba718>] (bus_for_each_drv+0x44/0x8c) from [<c03bc1dc>] (device_attach+0x70/0x88)
  [    3.612093] [<c03bc1dc>] (device_attach+0x70/0x88) from [<c03bb6e4>] (bus_probe_device+0x84/0xa8)
  [    3.621018] [<c03bb6e4>] (bus_probe_device+0x84/0xa8) from [<c03b992c>] (device_add+0x3e0/0x668)
  [    3.629853] [<c03b992c>] (device_add+0x3e0/0x668) from [<c03bdc3c>] (platform_device_add+0xbc/0x258)
  [    3.639031] [<c03bdc3c>] (platform_device_add+0xbc/0x258) from [<bf01234c>] (imx_ahci_probe+0x17c/0x1e8 [ahci_imx])
  [    3.649509] [<bf01234c>] (imx_ahci_probe+0x17c/0x1e8 [ahci_imx]) from [<c03bd7a8>] (platform_drv_probe+0x18/0x1c)
  [    3.659810] [<c03bd7a8>] (platform_drv_probe+0x18/0x1c) from [<c03bc378>] (driver_probe_device+0x130/0x374)
  [    3.669588] [<c03bc378>] (driver_probe_device+0x130/0x374) from [<c03bc648>] (__driver_attach+0x8c/0x90)
  [    3.679106] [<c03bc648>] (__driver_attach+0x8c/0x90) from [<c03ba7b4>] (bus_for_each_dev+0x54/0x88)
  [    3.688175] [<c03ba7b4>] (bus_for_each_dev+0x54/0x88) from [<c03bb914>] (bus_add_driver+0xe8/0x260)
  [    3.697266] [<c03bb914>] (bus_add_driver+0xe8/0x260) from [<c03bcb44>] (driver_register+0x78/0x14c)
  [    3.706353] [<c03bcb44>] (driver_register+0x78/0x14c) from [<c0008814>] (do_one_initcall+0xe0/0x198)
  [    3.715532] [<c0008814>] (do_one_initcall+0xe0/0x198) from [<c00a9844>] (load_module+0x1074/0x1778)
  [    3.724617] [<c00a9844>] (load_module+0x1074/0x1778) from [<c00aa004>] (SyS_init_module+0xbc/0x120)
  [    3.733707] [<c00aa004>] (SyS_init_module+0xbc/0x120) from [<c00146c0>] (ret_fast_syscall+0x0/0x30)
  [    3.742781] ---[ end trace 17860721d4bad439 ]---
  [    3.748403] ahci-imx: probe of ahci failed with error -17
  [    3.763773] Request for unknown module key 'Magrathea: Glacier signing key: ec957d9a18384eacadf7527998f7b9343803c433' err -11
  [    3.768979] platform ahci: failed to claim resource 0
  [    3.769006] ahci-imx: probe of ahci failed with error -16

  as it appears it's the same driver that tries to create the same
  sysfile multiple times, failing:

  root@ubuntu-desktop:~# cat /sys/bus/platform/devices/ahci/uevent
  OF_NAME=sata
  OF_FULLNAME=/soc/sata@02200000
  OF_COMPATIBLE_0=fsl,imx6q-ahci
  OF_COMPATIBLE_N=1
  MODALIAS=of:NsataT<NULL>Cfsl,imx6q-ahci

  Statically compiling support for AHCI_IMX works workaround this
  problem (and all the other kernel supporting this board - indeed -
  compile this driver statically BTW), so until a proper fix is found, i
  propose to compile it in.

  Fix:

  apply the two patches below

  Testcase:

  compile a patched kernel and boot it

  [1] http://www.spinics.net/lists/linux-ide/msg45823.html

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