drm/amd/display: Check hpd_gpio for NULL before accessing it

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dal_gpio_open and dal_gpio_unlock_pin dereference hpd_gpio.
Check for NULL before calling those functions.

Fixes: ac627caf6b ("drm/amd/display: add gpio lock/unlock")
Reported-by: Przemek Socha <soprwa@gmail.com>
CC: Chiawen Huang <chiawen.huang@amd.com>
CC: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Harry Wentland 2019-02-07 15:12:35 -05:00 • committed by Alex Deucher

parent 7fbd31ccea

commit 0461221316

1 changed files with 4 additions and 3 deletions

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drivers/gpu/drm/amd/display/dc/core/dc_link.c

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