| Message ID | 20180309045813.GA11964@embeddedgus (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 09 March 2018 04:58, Gustavo A. R. Silva wrote: > In preparation to enabling -Wvla, remove VLA usage and replace it > with fixed-length arrays. > > It seems that the length of array 'buf' will not exceed > DA9150_QIF_SHORT_SIZE bytes (2 bytes). But a fixed length > of DA9150_QIF_BYTE_SIZE bytes (8 bytes) was chosen in case > this change in the future. > > Fixed as part of the directive to remove all VLAs from > the kernel: https://lkml.org/lkml/2018/3/7/621 > > Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> > --- > drivers/power/supply/da9150-fg.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/power/supply/da9150-fg.c b/drivers/power/supply/da9150-fg.c > index 8b8ce97..96893be 100644 > --- a/drivers/power/supply/da9150-fg.c > +++ b/drivers/power/supply/da9150-fg.c > @@ -92,7 +92,7 @@ struct da9150_fg { > static u32 da9150_fg_read_attr(struct da9150_fg *fg, u8 code, u8 size) > > { > - u8 buf[size]; > + u8 buf[DA9150_QIF_BYTE_SIZE]; You can use DA9150_QIF_LONG_SIZE as that's the biggest size of an attribute which can be accessed. This will also save a little space. > u8 read_addr; > u32 res = 0; > int i; > @@ -111,7 +111,7 @@ static void da9150_fg_write_attr(struct da9150_fg *fg, u8 > code, u8 size, > u32 val) > > { > - u8 buf[size]; > + u8 buf[DA9150_QIF_BYTE_SIZE]; > u8 write_addr; > int i; > > -- > 2.7.4
On 03/09/2018 05:36 AM, Adam Thomson wrote: > On 09 March 2018 04:58, Gustavo A. R. Silva wrote: > >> In preparation to enabling -Wvla, remove VLA usage and replace it >> with fixed-length arrays. >> >> It seems that the length of array 'buf' will not exceed >> DA9150_QIF_SHORT_SIZE bytes (2 bytes). But a fixed length >> of DA9150_QIF_BYTE_SIZE bytes (8 bytes) was chosen in case >> this change in the future. >> >> Fixed as part of the directive to remove all VLAs from >> the kernel: https://lkml.org/lkml/2018/3/7/621 >> >> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> >> --- >> drivers/power/supply/da9150-fg.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/power/supply/da9150-fg.c b/drivers/power/supply/da9150-fg.c >> index 8b8ce97..96893be 100644 >> --- a/drivers/power/supply/da9150-fg.c >> +++ b/drivers/power/supply/da9150-fg.c >> @@ -92,7 +92,7 @@ struct da9150_fg { >> static u32 da9150_fg_read_attr(struct da9150_fg *fg, u8 code, u8 size) >> >> { >> - u8 buf[size]; >> + u8 buf[DA9150_QIF_BYTE_SIZE]; > > You can use DA9150_QIF_LONG_SIZE as that's the biggest size of an attribute > which can be accessed. This will also save a little space. > I got it. I'll send v2 shortly. Thanks for the feedback, Adam. -- Gustavo
diff --git a/drivers/power/supply/da9150-fg.c b/drivers/power/supply/da9150-fg.c index 8b8ce97..96893be 100644 --- a/drivers/power/supply/da9150-fg.c +++ b/drivers/power/supply/da9150-fg.c @@ -92,7 +92,7 @@ struct da9150_fg { static u32 da9150_fg_read_attr(struct da9150_fg *fg, u8 code, u8 size) { - u8 buf[size]; + u8 buf[DA9150_QIF_BYTE_SIZE]; u8 read_addr; u32 res = 0; int i; @@ -111,7 +111,7 @@ static void da9150_fg_write_attr(struct da9150_fg *fg, u8 code, u8 size, u32 val) { - u8 buf[size]; + u8 buf[DA9150_QIF_BYTE_SIZE]; u8 write_addr; int i;
In preparation to enabling -Wvla, remove VLA usage and replace it with fixed-length arrays. It seems that the length of array 'buf' will not exceed DA9150_QIF_SHORT_SIZE bytes (2 bytes). But a fixed length of DA9150_QIF_BYTE_SIZE bytes (8 bytes) was chosen in case this change in the future. Fixed as part of the directive to remove all VLAs from the kernel: https://lkml.org/lkml/2018/3/7/621 Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/power/supply/da9150-fg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)