linux-kernel - [PATCH] drm: msm: fix error check return value of irq_of_parse_and

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Date:   Fri, 22 Apr 2022 08:52:11 +0000
From:   cgel.zte@...il.com
To:     robdclark@...il.com, sean@...rly.run, dmitry.baryshkov@...aro.org
Cc:     quic_abhinavk@...cinc.com, airlied@...ux.ie, daniel@...ll.ch,
        swboyd@...omium.org, quic_mkrishn@...cinc.com,
        angelogioacchino.delregno@...labora.com, vulab@...as.ac.cn,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Lv Ruyi <lv.ruyi@....com.cn>, Zeal Robot <zealci@....com.cn>
Subject: [PATCH] drm: msm: fix error check return value of irq_of_parse_and_map()

From: Lv Ruyi <lv.ruyi@....com.cn>

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

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
 drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 3b92372e7bdf..1fb1ed9e95d9 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -570,7 +570,7 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
 	}
 
 	irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
-	if (irq < 0) {
+	if (!irq) {
 		ret = irq;
 		DRM_DEV_ERROR(&pdev->dev, "failed to get irq: %d\n", ret);
 		goto fail;
-- 
2.25.1