Hi Vinod On Fri, Jan 19, 2024 at 06:19:44PM +0530, Vinod Koul wrote: > We seem to have hit warnings of 'output may be truncated' which is fixed > by increasing the size of 'name' > > drivers/dma/dw-edma/dw-hdma-v0-debugfs.c: In function ‘dw_hdma_v0_debugfs_on’: > drivers/dma/dw-edma/dw-hdma-v0-debugfs.c:125:50: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 8 [-Werror=format-truncation=] > 125 | snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i); > | ^~ > > drivers/dma/dw-edma/dw-hdma-v0-debugfs.c: In function ‘dw_hdma_v0_debugfs_on’: > drivers/dma/dw-edma/dw-hdma-v0-debugfs.c:142:50: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 8 [-Werror=format-truncation=] > 142 | snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i); > | ^~ > drivers/dma/dw-edma/dw-edma-v0-debugfs.c: In function ‘dw_edma_debugfs_regs_wr’: > drivers/dma/dw-edma/dw-edma-v0-debugfs.c:193:50: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 8 [-Werror=format-truncation=] > 193 | snprintf(name, sizeof(name), "%s:%d", CHANNEL_STR, i); > | ^~ > > Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Thanks for submitting the patch. I've got a similar one hanging out in my local repo. I was going to submit it together with a few another fixes, but then I had to switch my efforts to another task and successfully forgot about this warning fix. Please note the warning you stated above is false-positive in this context since a name of the channel is printed to the string buffer in a format like "channel:<int>", where "<int>" is the channel number and which never supposed to be greater than eight. Anyway here is my tag: Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx> Here are three more tags which might be also reasonable to add: Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202311030041.DznTeuS5-lkp@xxxxxxxxx/ Closes: https://lore.kernel.org/oe-kbuild-all/202311030809.CjufIFaP-lkp@xxxxxxxxx/ -Serge(y) > --- > drivers/dma/dw-edma/dw-edma-v0-debugfs.c | 4 ++-- > drivers/dma/dw-edma/dw-hdma-v0-debugfs.c | 4 ++-- > 2 files changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c > index 0745d9e7d259..406f169b09a7 100644 > --- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c > +++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c > @@ -176,7 +176,7 @@ dw_edma_debugfs_regs_wr(struct dw_edma *dw, struct dentry *dent) > }; > struct dentry *regs_dent, *ch_dent; > int nr_entries, i; > - char name[16]; > + char name[32]; > > regs_dent = debugfs_create_dir(WRITE_STR, dent); > > @@ -239,7 +239,7 @@ static noinline_for_stack void dw_edma_debugfs_regs_rd(struct dw_edma *dw, > }; > struct dentry *regs_dent, *ch_dent; > int nr_entries, i; > - char name[16]; > + char name[32]; > > regs_dent = debugfs_create_dir(READ_STR, dent); > > diff --git a/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c b/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c > index 520c81978b08..dcdc57fe976c 100644 > --- a/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c > +++ b/drivers/dma/dw-edma/dw-hdma-v0-debugfs.c > @@ -116,7 +116,7 @@ static void dw_hdma_debugfs_regs_ch(struct dw_edma *dw, enum dw_edma_dir dir, > static void dw_hdma_debugfs_regs_wr(struct dw_edma *dw, struct dentry *dent) > { > struct dentry *regs_dent, *ch_dent; > - char name[16]; > + char name[32]; > int i; > > regs_dent = debugfs_create_dir(WRITE_STR, dent); > @@ -133,7 +133,7 @@ static void dw_hdma_debugfs_regs_wr(struct dw_edma *dw, struct dentry *dent) > static void dw_hdma_debugfs_regs_rd(struct dw_edma *dw, struct dentry *dent) > { > struct dentry *regs_dent, *ch_dent; > - char name[16]; > + char name[32]; > int i; > > regs_dent = debugfs_create_dir(READ_STR, dent); > -- > 2.43.0 > >
