drm/msm/dp: Fix platform_get_irq() check

The platform_get_irq() function returns negative error codes.  It never
returns zero.  Fix the check accordingly.

Fixes: 82c2a5751227 ("drm/msm/dp: tie dp_display_irq_handler() with dp driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/570755/
Link: https://lore.kernel.org/r/c12bb69b-d676-4345-9712-48aab48f2b48@moroto.mountain
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index fd4e62fe163fd968381d042a0cde6a55bbe73747..f8a9e8403c264476da2bb30de7cc6ec1e0057da4 100644 (file)
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1168,9 +1168,9 @@ static int dp_display_request_irq(struct dp_display_private *dp)
        struct platform_device *pdev = dp->dp_display.pdev;
 
        dp->irq = platform_get_irq(pdev, 0);
-       if (!dp->irq) {
+       if (dp->irq < 0) {
                DRM_ERROR("failed to get irq\n");
-               return -EINVAL;
+               return dp->irq;
        }
 
        rc = devm_request_irq(&pdev->dev, dp->irq, dp_display_irq_handler,