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drm/amd/display: fix a missing null check on a failed kzalloc

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Currently the allocation of config may fail and a null pointer
dereference on config can occur.  Fix this by added a null
check on a failed allocation of config.

Addresses-Coverity: ("Dereference null return")
Fixes: c2cd9d04ec ("drm/amd/display: Hook up calls to do stereo mux and dig programming to stereo control interface")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Colin Ian King
2019-07-23 15:23:12 +01:00
committed by Alex Deucher
parent 59d788b187
commit 87abff7788
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/amd/display/dc/core/dc.c
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@@ -1259,6 +1259,8 @@ bool dc_set_generic_gpio_for_stereo(bool enable,
struct gpio_generic_mux_config *config = kzalloc(sizeof(struct gpio_generic_mux_config),
GFP_KERNEL);
if (!config)
return false;
pin_info = dal_gpio_get_generic_pin_info(gpio_service, GPIO_ID_GENERIC, 0);
if (pin_info.mask == 0xFFFFFFFF || pin_info.offset == 0xFFFFFFFF) {