[PATCH v5 2/3] drm/msm/dp: replace variable err with len at dp_aux_link_power_up()

From: Kuogee Hsieh
Date: Mon Sep 12 2022 - 12:24:37 EST


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@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/dp/dp_link.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c
index 36f0af0..9d5381d 100644
--- a/drivers/gpu/drm/msm/dp/dp_link.c
+++ b/drivers/gpu/drm/msm/dp/dp_link.c
@@ -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);

--
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