drm/omap: dsi: fix unreachable code in dsi_vc_send_short()
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Message ID 20210126135511.10989-1-dong.menglong@zte.com.cn
State In Next
Commit bbd13d6a7b2e2ed05740a527a63db4f7bd6cb57e
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Series
  • drm/omap: dsi: fix unreachable code in dsi_vc_send_short()
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Commit Message

Menglong Dong Jan. 26, 2021, 1:55 p.m. UTC
From: Menglong Dong <dong.menglong@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.menglong@zte.com.cn>
---
 drivers/gpu/drm/omapdrm/dss/dsi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Comments

Sebastian Reichel Jan. 26, 2021, 9:15 p.m. UTC | #1
Hi,

On Tue, Jan 26, 2021 at 05:55:11AM -0800, menglong8.dong@gmail.com wrote:
> From: Menglong Dong <dong.menglong@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")

Documentation/process/submitting-patches.rst:

If your patch fixes a bug in a specific commit, e.g. you found an
issue using ``git bisect``, please use the 'Fixes:' tag with the
first 12 characters of the SHA-1 ID, and the one line summary. Do
not split the tag across multiple lines, tags are exempt from the
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Otherwise:

Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>

-- Sebastian

> Signed-off-by: Menglong Dong <dong.menglong@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
>

Patch
diff mbox series

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));