Hi,
We are facing crash in hdmi codec driver when we use DPCM based
dai-links. Crash is happening in hdmi_codec_eld_chmap() while accessing
chmap_info struct during hdmi_codec_startup(). However, chmap_info
struct is allocated in hdmi_codec_pcm_new() which is only called in
non-DPCM based dai-links.
Below is the crash stack:
[61.635493] Unable to handle kernel NULL pointer dereference at virtual
address 00000018
.....
[61.666696]CM = 0, WnR = 1
[61.669778] user pgtable: 4k pages, 39-bit VAs, pgd = ffffffc0d6633000
[61.676526] [0000000000000018] *pgd=0000000153fc8003,
*pud=0000000153fc8003, *pmd=0000000000000000
[61.685793] Internal error: Oops: 96000046 [#1] PREEMPT SMP
[61.722955] CPU: 7 PID: 2238 Comm: aplay Not tainted 4.14.72 #21
..
[61.740269] PC is at hdmi_codec_startup+0x124/0x164
[61.745308] LR is at hdmi_codec_startup+0xe4/0x164
..
We would probably need to move the implementation on pcm_new() to some
other function to make it compatible with DPCM.
Can you please provide suggestions in solving the issue.
Thanks,
Rohit
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