On 1/14/22 12:18 AM, Miaoqian Lin wrote:

platform_get_irq() returns negative error number instead 0 on failure.

the 'instead of' wording is a bit misleading:

platform_get_irq() returns non-zero IRQ number on success, negative error number on failure. Zero is not a valid return valid.

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;