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

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Date:   Fri, 22 Apr 2022 08:49:51 +0000
From:   cgel.zte@...il.com
To:     robdclark@...il.com, sean@...rly.run, quic_abhinavk@...cinc.com
Cc:     airlied@...ux.ie, daniel@...ll.ch, swboyd@...omium.org,
        dmitry.baryshkov@...aro.org, quic_khsieh@...cinc.com,
        bjorn.andersson@...aro.org, linux@...ck-us.net,
        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/dp: 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.

Fixes: 	8ede2ecc3e5e ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets")
Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
 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);
-	if (dp->irq < 0) {
+	if (!dp->irq) {
 		rc = dp->irq;
 		DRM_ERROR("failed to get irq: %d\n", rc);
 		return rc;
-- 
2.25.1