[PATCH v1] drm/bridge: anx7625: Don't store unread return value

[Sam Ravnborg]

Hi Robert,

On Mon, Aug 16, 2021 at 01:14:51PM +0200, Robert Foss wrote:
> The return value of sp_tx_rst_aux() is stored, but never read.
> This happens in the context EDID communication already failing,
> which means that this additional failure doesn't necessarily
> convey any additional inforamation.
> 
> This means that we can safely avoid storing the value.
> 
> Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP")
> 
> Reported-by: kernel test robot <lkp at intel.com>
> Signed-off-by: Robert Foss <robert.foss at linaro.org>
> ---
>  drivers/gpu/drm/bridge/analogix/anx7625.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> index 14d73fb1dd15b..3471785915c45 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -771,7 +771,7 @@ static int segments_edid_read(struct anx7625_data *ctx,
>  		ret = sp_tx_aux_rd(ctx, 0xf1);
>  
>  		if (ret) {
> -			ret = sp_tx_rst_aux(ctx);
> +			sp_tx_rst_aux(ctx);
>  			DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
>  		} else {
>  			ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,

>From a quick look this seems to be the wrong fix.
Replace return 0; with return ret; as the last line in this function
looks like the correct fix to me.
With a careful audit that the error handling is OK in said function.

	Sam