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drm/msm/dp: replace variable err with len at dp_aux_link_power_up()

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drm_dp_dpcd_readb() will return 1 to indicate one byte had been read
successfully. This patch replace variable "err" with "len" have more
correct meaning.

changes in v5:
-- split into 3 patches

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/502533/
Link: https://lore.kernel.org/r/1662999830-13916-3-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Kuogee Hsieh 2022-09-12 09:23:49 -07:00 committed by Dmitry Baryshkov
parent 9a5c1586e8
commit d54c518a49
1 changed files with 7 additions and 7 deletions
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14
drivers/gpu/drm/msm/dp/dp_link.c
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@ -49,21 +49,21 @@ static int dp_aux_link_power_up(struct drm_dp_aux *aux,
struct dp_link_info *link)
{
u8 value;
int err;
ssize_t len;
if (link->revision < 0x11)
return 0;
err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
if (err < 0)
return err;
len = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
if (len < 0)
return len;
value &= ~DP_SET_POWER_MASK;
value |= DP_SET_POWER_D0;
err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
if (err < 0)
return err;
len = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
if (len < 0)
return len;
usleep_range(1000, 2000);