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mirror_ubuntu-kernels/sound/hda
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Takashi Iwai 098a0a62c1 ALSA: hda: Abort capability probe at invalid register read 
The loop in snd_hdac_bus_parse_capabilities() may go to nirvana when
it hits an invalid register value read:

 BUG: unable to handle kernel paging request at ffffad5dc41f3fff
 IP: pci_azx_readl+0x5/0x10 [snd_hda_intel]
 Call Trace:
  snd_hdac_bus_parse_capabilities+0x3c/0x1f0 [snd_hda_core]
  azx_probe_continue+0x7d5/0x940 [snd_hda_intel]
  .....

This happened on a new Intel machine, and we need to check the value
and abort the loop accordingly.

[Note: the fixes tag below indicates only the commit where this patch
 can be applied; the original problem was introduced even before that
 commit]

Fixes: 6720b38420 ("ALSA: hda - move bus_parse_capabilities to core")
Cc: <stable@vger.kernel.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-10-18 12:26:44 +02:00
..
ext ALSA: hda - add more ML register definitions 2017-04-07 10:39:18 +02:00
array.c ALSA: hda: Fix krealloc() with __GFP_ZERO usage 2016-08-03 15:17:22 +02:00
hda_bus_type.c ALSA: hda - Advertise MODALIAS in uevent 2015-10-20 10:15:53 +02:00
hdac_bus.c ALSA: hda: Fix potential race at unregistration and unsol events 2017-06-20 07:53:57 +02:00
hdac_controller.c ALSA: hda: Abort capability probe at invalid register read 2017-10-18 12:26:44 +02:00
hdac_device.c ALSA: hda: Fix potential race at unregistration and unsol events 2017-06-20 07:53:57 +02:00
hdac_i915.c ALSA: hda: constify pci_device_id. 2017-07-18 20:01:21 +02:00
hdac_regmap.c ALSA: hdac_regmap - fix the register access for runtime PM 2016-06-17 14:01:06 +02:00
hdac_stream.c ALSA: hda - Avoid tricky macros 2017-04-03 08:42:43 +02:00
hdac_sysfs.c ALSA: hda - Add hdaudio bus modalias support 2015-10-20 10:15:09 +02:00
hdmi_chmap.c ALSA: hda: fix some klockwork scan warnings 2016-06-16 10:10:12 +02:00
Kconfig ALSA: HDAC: move SND_HDA_PREALLOC_SIZE to core 2015-06-16 17:40:38 +02:00
local.h ALSA: hda - add helper to get channels from cap bits 2016-04-28 18:45:26 +01:00
Makefile ALSA: hda - Add hdmi chmap verb programming ops to chmap object 2016-03-07 15:41:31 +01:00
trace.c ALSA: hda - Re-add tracepoints to HD-audio core driver 2015-03-23 13:17:58 +01:00
trace.h ALSA: hda - add hdac stream trace 2015-05-18 10:06:20 +02:00