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drm/omap: dsi: fix unsigned expression compared with zero

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r is "u32" always >= 0,mipi_dsi_create_packet may return little than zero.
so r < 0 condition is never accessible.

Fixes coccicheck warnings:
./drivers/gpu/drm/omapdrm/dss/dsi.c:2155:5-6:
WARNING: Unsigned expression compared with zero: r < 0

Signed-off-by: Junlin Yang <yangjunlin@yulong.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210312071445.1721-1-angkery@163.com
This commit is contained in:
Junlin Yang 2021-03-12 15:14:45 +08:00 committed by Tomi Valkeinen
parent 6c5403173a
commit 6909115442
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/omapdrm/dss/dsi.c
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@ -2149,11 +2149,12 @@ static int dsi_vc_send_short(struct dsi_data *dsi, int vc,
const struct mipi_dsi_msg *msg)
{
struct mipi_dsi_packet pkt;
int ret;
u32 r;
r = mipi_dsi_create_packet(&pkt, msg);
if (r < 0)
return r;
ret = mipi_dsi_create_packet(&pkt, msg);
if (ret < 0)
return ret;
WARN_ON(!dsi_bus_is_locked(dsi));