Quoting cgel.zte@xxxxxxxxx (2022-04-22 01:49:51)
> From: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
>
> The irq_of_parse_and_map() function returns 0 on failure, and does not
> return an negative value.
>
> Fixes: 8ede2ecc3e5e ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets")
> Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
> Signed-off-by: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/dp/dp_display.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index a42732b67349..3926d2ac107d 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1239,7 +1239,7 @@ int dp_display_request_irq(struct msm_dp *dp_display)
> dp = container_of(dp_display, struct dp_display_private, dp_display);
>
> dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
Why can't platform_get_irq() be used?
> - if (dp->irq < 0) {
> + if (!dp->irq) {
> rc = dp->irq;
zero as an error return value is an error?
> DRM_ERROR("failed to get irq: %d\n", rc);
> return rc;
