[PATCH 5.18 120/879] drm: msm: fix error check return value of irq_of_parse_and_map()

From: Greg Kroah-Hartman
Date: Tue Jun 07 2022 - 18:11:53 EST


From: Lv Ruyi <lv.ruyi@xxxxxxxxxx>

[ Upstream commit b9e4f1d2b505df8e2439b63e67afaa287c1c43e2 ]

The irq_of_parse_and_map() function returns 0 on failure, and does not
return an negative value.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/483175/
Link: https://lore.kernel.org/r/20220424031959.3172406-1-lv.ruyi@xxxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 3b92372e7bdf..1d4bbde29320 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -570,9 +570,9 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
}

irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
- if (irq < 0) {
- ret = irq;
- DRM_DEV_ERROR(&pdev->dev, "failed to get irq: %d\n", ret);
+ if (!irq) {
+ ret = -EINVAL;
+ DRM_DEV_ERROR(&pdev->dev, "failed to get irq\n");
goto fail;
}

--
2.35.1