[PATCH] drm/omap: dsi: fix unreachable code in dsi_vc_send_short()

[menglong8 . dong]

From: Menglong Dong <dong.mengl...@zte.com.cn>

The 'r' in dsi_vc_send_short() is of type 'unsigned int', so the
'r < 0' can't be true.

Fix this by introducing a 'err' insteaded.

Fixes: 1ed6253856cb
("drm/omap: dsi: switch dsi_vc_send_long/short to mipi_dsi_msg")

Signed-off-by: Menglong Dong <dong.mengl...@zte.com.cn>
---
 drivers/gpu/drm/omapdrm/dss/dsi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c 
b/drivers/gpu/drm/omapdrm/dss/dsi.c
index 8e11612f5fe1..febcc87ddfe1 100644
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -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 err;
        u32 r;
 
-       r = mipi_dsi_create_packet(&pkt, msg);
-       if (r < 0)
-               return r;
+       err = mipi_dsi_create_packet(&pkt, msg);
+       if (err)
+               return err;
 
        WARN_ON(!dsi_bus_is_locked(dsi));
 
-- 
2.25.1