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drm/amd/display: should check error using DC_OK

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core_link_read_dpcd returns only DC_OK(1) and DC_ERROR_UNEXPECTED(-1),
the caller should check error using DC_OK instead of checking against 0

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tong Zhang 2020-08-16 03:32:12 -04:00 committed by Alex Deucher
parent d012a7190f
commit ed9ab229fe
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -4409,9 +4409,9 @@ bool dc_link_get_backlight_level_nits(struct dc_link *link,
link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
return false;
if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
dpcd_backlight_get.raw,
sizeof(union dpcd_source_backlight_get)))
sizeof(union dpcd_source_backlight_get)) != DC_OK)
return false;
*backlight_millinits_avg =
@ -4450,9 +4450,9 @@ bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_milli
link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
return false;
if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
(uint8_t *) backlight_millinits,
sizeof(uint32_t)))
sizeof(uint32_t)) != DC_OK)
return false;
return true;