usb: dwc3: host: remove dead code in dwc3_host_get_irq()

According to the description of platform_get_irq()
 * Return: non-zero IRQ number on success,
 			negative error number on failure.
and the code, platform_get_irq() will return -EINVAL
instead of IRQ0.

So platform_get_irq() no longer returns 0, there is no
need to check whether the return value is 0.

Found by Smatch:
drivers/usb/dwc3/host.c:60 dwc3_host_get_irq()
	warn: platform_get_irq() does not return zero

Signed-off-by: Mingxuan Xiang <mx_xiang@hust.edu.cn>
Reviewed-by: Dan Carpenter <error27@gmail.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230324060934.1686859-1-mx_xiang@hust.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index f6f13e7..61f57fe 100644 (file)
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -52,13 +52,8 @@ static int dwc3_host_get_irq(struct dwc3 *dwc)
                goto out;
 
        irq = platform_get_irq(dwc3_pdev, 0);
-       if (irq > 0) {
+       if (irq > 0)
                dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
-               goto out;
-       }
-
-       if (!irq)
-               irq = -EINVAL;
 
 out:
        return irq;