usb: gadget: udc: renesas_usb3: fix error return code in renesas_usb3_probe()

platform_get_irq() returns an error code, but the renesas_usb3 driver
ignores it and always returns -ENODEV. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.

Also, notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print error message and propagate the return value of platform_get_irq
on failure.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 62dc9c7798e78a034a9e63f8c3163fcebec9e57a..6110dfcbaa260fb6ea1f4f2b691a73c7f1c62099 100644 (file)
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -2457,8 +2457,10 @@ static int renesas_usb3_probe(struct platform_device *pdev)
        priv = match->data;
 
        irq = platform_get_irq(pdev, 0);
-       if (irq < 0)
-               return -ENODEV;
+       if (irq < 0) {
+               dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+               return irq;
+       }
 
        usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
        if (!usb3)