On Thu, Apr 12, 2018 at 09:33:33PM +0200, Mathieu Malaterre wrote:
> In function ‘radeon_process_i2c_ch’ a comparison of a u8 value against
> 255 is done. Since it is always false, change the signature of this
> function to use an `int` instead, which match the type used in caller:
> `radeon_atom_hw_i2c_xfer`.
>
> Fix the following warning triggered with W=1:
>
> CC [M] drivers/gpu/drm/radeon/atombios_i2c.o
> drivers/gpu/drm/radeon/atombios_i2c.c: In function ‘radeon_process_i2c_ch’:
> drivers/gpu/drm/radeon/atombios_i2c.c:71:11: warning: comparison is always false due to limited range of data type [-Wtype-limits]
> if (num > ATOM_MAX_HW_I2C_READ) {
> ^
>
> Signed-off-by: Mathieu Malaterre <malat@xxxxxxxxxx>
Reviewed-by: Huang Rui <ray.huang@xxxxxxx>
> ---
> drivers/gpu/drm/radeon/atombios_i2c.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/atombios_i2c.c b/drivers/gpu/drm/radeon/atombios_i2c.c
> index 4157780585a0..9022e9af11a0 100644
> --- a/drivers/gpu/drm/radeon/atombios_i2c.c
> +++ b/drivers/gpu/drm/radeon/atombios_i2c.c
> @@ -35,7 +35,7 @@
>
> static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan,
> u8 slave_addr, u8 flags,
> - u8 *buf, u8 num)
> + u8 *buf, int num)
> {
> struct drm_device *dev = chan->dev;
> struct radeon_device *rdev = dev->dev_private;
> --
> 2.11.0
>
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