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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 v2] slimbus: qcom:  Fix IRQ check in qcom_slim_probe
Date:   Tue,  1 Mar 2022 06:14:21 +0000
Message-Id: <20220301061421.14366-1-linmq006@gmail.com>
In-Reply-To: <239c3b32-6754-02ba-6bfd-7f05fa2adfed@linux.intel.com>
References: <239c3b32-6754-02ba-6bfd-7f05fa2adfed@linux.intel.com>
Precedence: bulk

platform_get_irq() returns non-zero IRQ number on success,
negative error number 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>
---
changes in v2:
- use more precise expression in commit message.
---
 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