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usb: dwc3: omap: fix error return code in dwc3_omap_probe() 

platform_get_irq() returns an error code, but the dwc3-omap driver
ignores it and always returns -EINVAL. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.

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 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>
This commit is contained in:
Gustavo A. R. Silva 2017-08-07 23:25:34 -05:00 committed by Felipe Balbi
parent 8bcd988972
commit 0ae99ecba7
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/dwc3/dwc3-omap.c
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@ -478,8 +478,8 @@ static int dwc3_omap_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0); irq = platform_get_irq(pdev, 0);
if (irq < 0) { if (irq < 0) {
dev_err(dev, "missing IRQ resource\n"); dev_err(dev, "missing IRQ resource: %d\n", irq);
return -EINVAL; return irq;
} }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);