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Date: Mon, 13 Sep 2021 15:14:03 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>, Felipe Balbi <balbi@...nel.org>, Sergey Shtylyov <s.shtylyov@....ru>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.13 182/300] usb: gadget: udc: s3c2410: add IRQ check From: Sergey Shtylyov <s.shtylyov@....ru> [ Upstream commit ecff88e819e31081d41cd05bb199b9bd10e13e90 ] The driver neglects to check the result of platform_get_irq()'s call and blithely passes the negative error codes to request_irq() (which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding an original error code. Stop calling request_irq() with the invalid IRQ #s. Fixes: 188db4435ac6 ("usb: gadget: s3c: use platform resources") Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com> Acked-by: Felipe Balbi <balbi@...nel.org> Signed-off-by: Sergey Shtylyov <s.shtylyov@....ru> Link: https://lore.kernel.org/r/bd69b22c-b484-5a1f-c798-78d4b78405f2@omp.ru Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/usb/gadget/udc/s3c2410_udc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c index b154b62abefa..82c4f3fb2dae 100644 --- a/drivers/usb/gadget/udc/s3c2410_udc.c +++ b/drivers/usb/gadget/udc/s3c2410_udc.c @@ -1784,6 +1784,10 @@ static int s3c2410_udc_probe(struct platform_device *pdev) s3c2410_udc_reinit(udc); irq_usbd = platform_get_irq(pdev, 0); + if (irq_usbd < 0) { + retval = irq_usbd; + goto err_udc_clk; + } /* irq setup after old hardware state is cleaned up */ retval = request_irq(irq_usbd, s3c2410_udc_irq, -- 2.30.2
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