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Takashi Iwai c2432466f5 ALSA: hda: Fix too short HDMI/DP chmap reporting 
We got a regression report about the HD-audio HDMI chmap, where some
surround channels are reported as UNKNOWN.  The git bisection pointed
the culprit at the commit 9b3dc8aa3f ("ALSA: hda - Register chmap
obj as priv data instead of codec").  The story behind scene is like
this:

- While moving the code out of the legacy HDA to the HDA common place,
  the patch modifies the code to obtain the chmap array indirectly in
  a byte array, and it expands it to kctl value array.
- At the latter operation, the size of the array is wrongly passed by
  sizeof() to the pointer.
- It can be 4 on 32bit arch, thus too short for 6+ channels.
  (And that's the reason why it didn't hit other persons; it's 8 on
  64bit arch, thus it's usually enough.)

The code was further changed meanwhile, but the problem persisted.
Let's fix it by correctly evaluating the array size.

Fixes: 9b3dc8aa3f ("ALSA: hda - Register chmap obj as priv data instead of codec")
Reported-by: VDR User <user.vdr@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 		2017-11-17 12:20:37 +01:00
..
ext ALSA: hda - add more ML register definitions 2017-04-07 10:39:18 +02:00
Kconfig
…
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
array.c ALSA: hda: Fix krealloc() with __GFP_ZERO usage 2016-08-03 15:17:22 +02:00
hda_bus_type.c
…
hdac_bus.c ALSA: hda: Fix potential race at unregistration and unsol events 2017-06-20 07:53:57 +02:00
hdac_controller.c Merge branch 'for-next' into for-linus 2017-11-13 15:43:13 +01:00
hdac_device.c ALSA: hda: Avoid racy recreation of widget kobjects 2017-10-19 13:58:36 +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 ASoC: Updates for v4.15 2017-11-13 15:45:57 +01:00
hdmi_chmap.c ALSA: hda: Fix too short HDMI/DP chmap reporting 2017-11-17 12:20:37 +01:00
local.h ASoC: Updates for v4.15 2017-11-13 15:45:57 +01:00
trace.c
…
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00