[PATCH] drm/msm/dpu: tidy up some error checking

[Abhinav Kumar]

On 6/6/2023 1:33 AM, Dan Carpenter wrote:
> The "vsync_hz" variable is unsigned int so it can't be less
> than zero.  The dpu_kms_get_clk_rate() function used to return a u64
> but I previously changed it to return an unsigned long and zero on
> error so it matches clk_get_rate().
> 
> Change the "vsync_hz" type to unsigned long as well and change the
> error checking to check for zero instead of negatives.  This change
> does not affect runtime at all.  It's just a clean up.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter at linaro.org>
> ---

Reviewed-by: Abhinav Kumar <quic_abhinavk at quicinc.com>