[PATCH] media: davinci: vpif: fix array out of bound warnings

classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

[PATCH] media: davinci: vpif: fix array out of bound warnings

Lad, Prabhakar
This patch fixes following array out of bound warnings,

drivers/media/platform/davinci/vpif_display.c: In function 'vpif_remove':
drivers/media/platform/davinci/vpif_display.c:1389:36: warning: iteration
1u invokes undefined behavior [-Waggressive-loop-optimizations]
   vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
                                    ^
drivers/media/platform/davinci/vpif_display.c:1385:2: note: containing loop
  for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
  ^
drivers/media/platform/davinci/vpif_capture.c: In function 'vpif_remove':
drivers/media/platform/davinci/vpif_capture.c:1581:36: warning: iteration
1u invokes undefined behavior [-Waggressive-loop-optimizations]
   vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
                                    ^
drivers/media/platform/davinci/vpif_capture.c:1577:2: note: containing loop
  for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
  ^
drivers/media/platform/davinci/vpif_capture.c:1580:23: warning: array subscript
is above array bounds [-Warray-bounds]
   common = &ch->common[i];

Reported-by: Hans Verkuil <[hidden email]>
Signed-off-by: Lad, Prabhakar <[hidden email]>
---
 drivers/media/platform/davinci/vpif_capture.c | 2 +-
 drivers/media/platform/davinci/vpif_display.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 2f90f0d..3a85238 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1577,7 +1577,7 @@ static int vpif_remove(struct platform_device *device)
  for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
  /* Get the pointer to the channel object */
  ch = vpif_obj.dev[i];
- common = &ch->common[i];
+ common = &ch->common[VPIF_VIDEO_INDEX];
  vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
  /* Unregister video device */
  video_unregister_device(ch->video_dev);
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 0bd6dcb..6c6bd6b 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -1385,7 +1385,7 @@ static int vpif_remove(struct platform_device *device)
  for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
  /* Get the pointer to the channel object */
  ch = vpif_obj.dev[i];
- common = &ch->common[i];
+ common = &ch->common[VPIF_VIDEO_INDEX];
  vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
  /* Unregister video device */
  video_unregister_device(ch->video_dev);
--
1.9.1

_______________________________________________
Davinci-linux-open-source mailing list
[hidden email]
http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

Re: [PATCH] media: davinci: vpif: fix array out of bound warnings

Sakari Ailus
Hi Prabhakar,

On Fri, Jul 18, 2014 at 05:31:51PM +0100, Lad, Prabhakar wrote:

> This patch fixes following array out of bound warnings,
>
> drivers/media/platform/davinci/vpif_display.c: In function 'vpif_remove':
> drivers/media/platform/davinci/vpif_display.c:1389:36: warning: iteration
> 1u invokes undefined behavior [-Waggressive-loop-optimizations]
>    vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
>                                     ^
> drivers/media/platform/davinci/vpif_display.c:1385:2: note: containing loop
>   for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
>   ^
> drivers/media/platform/davinci/vpif_capture.c: In function 'vpif_remove':
> drivers/media/platform/davinci/vpif_capture.c:1581:36: warning: iteration
> 1u invokes undefined behavior [-Waggressive-loop-optimizations]
>    vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
>                                     ^
> drivers/media/platform/davinci/vpif_capture.c:1577:2: note: containing loop
>   for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
>   ^
> drivers/media/platform/davinci/vpif_capture.c:1580:23: warning: array subscript
> is above array bounds [-Warray-bounds]
>    common = &ch->common[i];
>
> Reported-by: Hans Verkuil <[hidden email]>
> Signed-off-by: Lad, Prabhakar <[hidden email]>
> ---
>  drivers/media/platform/davinci/vpif_capture.c | 2 +-
>  drivers/media/platform/davinci/vpif_display.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
> index 2f90f0d..3a85238 100644
> --- a/drivers/media/platform/davinci/vpif_capture.c
> +++ b/drivers/media/platform/davinci/vpif_capture.c
> @@ -1577,7 +1577,7 @@ static int vpif_remove(struct platform_device *device)
>   for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
>   /* Get the pointer to the channel object */
>   ch = vpif_obj.dev[i];
> - common = &ch->common[i];
> + common = &ch->common[VPIF_VIDEO_INDEX];

You could refer to the alloc_ctz directly w/o extra local variables. Also
local variables that are only used inside the loop could be declared there
as well.

Acked-by: Sakari Ailus <[hidden email]>

>   vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
>   /* Unregister video device */
>   video_unregister_device(ch->video_dev);
> diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
> index 0bd6dcb..6c6bd6b 100644
> --- a/drivers/media/platform/davinci/vpif_display.c
> +++ b/drivers/media/platform/davinci/vpif_display.c
> @@ -1385,7 +1385,7 @@ static int vpif_remove(struct platform_device *device)
>   for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
>   /* Get the pointer to the channel object */
>   ch = vpif_obj.dev[i];
> - common = &ch->common[i];
> + common = &ch->common[VPIF_VIDEO_INDEX];
>   vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
>   /* Unregister video device */
>   video_unregister_device(ch->video_dev);

--
Kind regards,

Sakari Ailus
e-mail: [hidden email] XMPP: [hidden email]
_______________________________________________
Davinci-linux-open-source mailing list
[hidden email]
http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
Loading...