korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 21:38:32 +08:00
Code Issues Packages Projects Releases Wiki Activity

dmaengine: sh: rz-dmac: Avoid format-overflow warning

Browse Source 
The max channel count for RZ DMAC is 16, hence use u8 instead of unsigned
int and make the pdev_irqname string long enough to avoid the warning.

This fixes the below issue:
drivers/dma/sh/rz-dmac.c: In function ‘rz_dmac_probe’:
drivers/dma/sh/rz-dmac.c:770:34: warning: ‘%u’ directive writing between 1 and 10 bytes into a region of size 3 [-Wformat-overflow=]
  770 |         sprintf(pdev_irqname, "ch%u", index);
      |                                  ^~
In function ‘rz_dmac_chan_probe’,
    inlined from ‘rz_dmac_probe’ at drivers/dma/sh/rz-dmac.c:910:9:
drivers/dma/sh/rz-dmac.c:770:31: note: directive argument in the range [0, 4294967294]
  770 |         sprintf(pdev_irqname, "ch%u", index);
      |                               ^~~~~~
drivers/dma/sh/rz-dmac.c:770:9: note: ‘sprintf’ output between 4 and 13 bytes into a destination of size 5
  770 |         sprintf(pdev_irqname, "ch%u", index);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

While at it use scnprintf() instead of sprintf() to make the code
more robust.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240110222717.193719-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Lad Prabhakar 2024-01-10 22:27:17 +00:00 committed by Vinod Koul
parent 98373a2115
commit c4d6dcb3b6
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/dma/sh/rz-dmac.c
View File

@ -755,11 +755,11 @@ static struct dma_chan *rz_dmac_of_xlate(struct of_phandle_args *dma_spec,
static int rz_dmac_chan_probe(struct rz_dmac *dmac,
struct rz_dmac_chan *channel,
unsigned int index)
u8 index)
{
struct platform_device *pdev = to_platform_device(dmac->dev);
struct rz_lmdesc *lmdesc;
char pdev_irqname[5];
char pdev_irqname[6];
char *irqname;
int ret;
@ -767,7 +767,7 @@ static int rz_dmac_chan_probe(struct rz_dmac *dmac,
channel->mid_rid = -EINVAL;
/* Request the channel interrupt. */
sprintf(pdev_irqname, "ch%u", index);
scnprintf(pdev_irqname, sizeof(pdev_irqname), "ch%u", index);
channel->irq = platform_get_irq_byname(pdev, pdev_irqname);
if (channel->irq < 0)
return channel->irq;
@ -845,9 +845,9 @@ static int rz_dmac_probe(struct platform_device *pdev)
struct dma_device *engine;
struct rz_dmac *dmac;
int channel_num;
unsigned int i;
int ret;
int irq;
u8 i;
dmac = devm_kzalloc(&pdev->dev, sizeof(*dmac), GFP_KERNEL);
if (!dmac)