slimbus: qcom: Fix IRQ check in qcom_slim_probe

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")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220510095205.337-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
index f04b961b96cd4de5513a46fc2b24d27f9ef22e35..ec58091fc948a26608baf717a44d67c679d180e0 100644 (file)
--- 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;