drm/amd/display: Fix USB4 hot plug crash issue

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[Why]
Notify data from outbox corrupt, the notify type should be 2 (HPD) instead of 0
(No data). We copied the address instead of the value. The memory might be
freed in the end of outbox IRQ

[How]
We should allocate the memory of notify and copy the whole content from outbox to
hpd handle function

Fixes: 88f52b1fff ("drm/amd/display: Support for SET_CONFIG processing with DMUB")
Signed-off-by: Jude Shih <shenshih@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Jude Shih 2021-10-18 12:04:23 +08:00 • committed by Alex Deucher

parent f638d7505f

commit 094b21c1a3

1 changed files with 16 additions and 7 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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