[PATCH 5.13 182/300] usb: gadget: udc: s3c2410: add IRQ check

Greg Kroah-Hartman
2021-09-13T14:09:02Z

From: Sergey Shtylyov <s.shtylyov@omp.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@canonical.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/bd69b22c-b484-5a1f-c798-78d4b78405f2@omp.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.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