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From: Miaoqian Lin <linmq006@gmail.com>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Sagar Dharia <sdharia@codeaurora.org>,
	linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org,
	linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH] slimbus: qcom:  Fix IRQ check in qcom_slim_probe
Date: Fri, 14 Jan 2022 06:18:29 +0000	[thread overview]
Message-ID: <20220114061830.13456-1-linmq006@gmail.com> (raw)

platform_get_irq() returns negative error number instead 0 on failure.
And the doc of platform_get_irq() provides a usage example:

    int irq = platform_get_irq(pdev, 0);
    if (irq < 0)
        return irq;

Fix the check of return value to catch errors correctly.

Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/slimbus/qcom-ctrl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
index f04b961b96cd..ec58091fc948 100644
--- a/drivers/slimbus/qcom-ctrl.c
+++ b/drivers/slimbus/qcom-ctrl.c
@@ -510,9 +510,9 @@ 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;
+		return ctrl->irq;
 	}
 
 	sctrl = &ctrl->ctrl;
-- 
2.17.1


             reply	other threads:[~2022-01-14  6:18 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-14  6:18 Miaoqian Lin [this message]
2022-01-14 15:14 ` [PATCH] slimbus: qcom: Fix IRQ check in qcom_slim_probe Pierre-Louis Bossart
2022-03-01  6:14   ` [PATCH v2] " Miaoqian Lin
2022-04-12  9:06     ` Srinivas Kandagatla

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