linux-kernel - [PATCH] slimbus: qcom: fix error check return value of platform_get

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Message-Id: <20220412090259.2533316-1-lv.ruyi@zte.com.cn>
Date:   Tue, 12 Apr 2022 09:02:59 +0000
From:   cgel.zte@...il.com
To:     agross@...nel.org, bjorn.andersson@...aro.org,
        srinivas.kandagatla@...aro.org
Cc:     gregkh@...uxfoundation.org, sdharia@...eaurora.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, Lv Ruyi <lv.ruyi@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] slimbus: qcom: fix error check return value of platform_get_irq()

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

platform_get_irq() return negative value on failure, so null check of
ctrl->irq is incorrect. Fix it by comparing whether it is less than zero.

Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver")
Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
 drivers/slimbus/qcom-ctrl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
index f04b961b96cd..b2f01e155d77 100644
--- a/drivers/slimbus/qcom-ctrl.c
+++ b/drivers/slimbus/qcom-ctrl.c
@@ -510,7 +510,7 @@ static int qcom_slim_probe(struct platform_device *pdev)
 	}
 
 	ctrl->irq = platform_get_irq(pdev, 0);
-	if (!ctrl->irq) {
+	if (ctrl->irq < 0) {
 		dev_err(&pdev->dev, "no slimbus IRQ\n");
 		return -ENODEV;
 	}
-- 
2.25.1