On Sun, 2021-05-09 at 22:32 +0300, Michael Zaidman wrote:
> Fixes: 6a82582d9fa4 ("HID: ft260: add usb hid to i2c host bridge driver")
>
> Fix warning reported by static analysis when built with W=1 for arm64 by
> clang version 13.0.0
>
> > > drivers/hid/hid-ft260.c:794:44: warning: format specifies type 'short' but
> the argument has type 'int' [-Wformat]
> return scnprintf(buf, PAGE_SIZE, "%hi\n", le16_to_cpu(*field));
> ~~~ ^~~~~~~~~~~~~~~~~~~
> %i
> include/linux/byteorder/generic.h:91:21: note: expanded from
> macro 'le16_to_cpu'
> #define le16_to_cpu __le16_to_cpu
> ^
> include/uapi/linux/byteorder/big_endian.h:36:26: note: expanded from
> macro '__le16_to_cpu'
> #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/uapi/linux/swab.h:105:2: note: expanded from macro '__swab16'
> (__builtin_constant_p((__u16)(x)) ? \
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Signed-off-by: Michael Zaidman <michael.zaidman@xxxxxxxxx>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> ---
> drivers/hid/hid-ft260.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-ft260.c b/drivers/hid/hid-ft260.c
> index 047aa85a7c83..38794a29599c 100644
> --- a/drivers/hid/hid-ft260.c
> +++ b/drivers/hid/hid-ft260.c
> @@ -791,7 +791,7 @@ static int ft260_word_show(struct hid_device *hdev, int id, u8 *cfg, int len,
> if (ret != len && ret >= 0)
> return -EIO;
>
>
> - return scnprintf(buf, PAGE_SIZE, "%hi\n", le16_to_cpu(*field));
> + return scnprintf(buf, PAGE_SIZE, "%d\n", le16_to_cpu(*field));
> }
There are 2 of these so I wonder about the static analysis.
It's probably better to use sysfs_emit as well.
---
drivers/hid/hid-ft260.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-ft260.c b/drivers/hid/hid-ft260.c
index 7a9ba984a75a..475641682fff 100644
--- a/drivers/hid/hid-ft260.c
+++ b/drivers/hid/hid-ft260.c
@@ -783,7 +783,7 @@ static int ft260_byte_show(struct hid_device *hdev, int id, u8 *cfg, int len,
if (ret != len && ret >= 0)
return -EIO;
- return scnprintf(buf, PAGE_SIZE, "%hi\n", *field);
+ return sysfs_emit(buf, "%d\n", *field);
}
static int ft260_word_show(struct hid_device *hdev, int id, u8 *cfg, int len,
@@ -795,7 +795,7 @@ static int ft260_word_show(struct hid_device *hdev, int id, u8 *cfg, int len,
if (ret != len && ret >= 0)
return -EIO;
- return scnprintf(buf, PAGE_SIZE, "%hi\n", le16_to_cpu(*field));
+ return sysfs_emit(buf, "%d\n", le16_to_cpu(*field));
}
#define FT260_ATTR_SHOW(name, reptype, id, type, func) \
