diff mbox series

[1/9] usb: dwc3: meson-g12a: add IRQ check

Message ID f8eae1ec-91c7-e26e-665d-777930b001a9@omp.ru (mailing list archive)
State New, archived
Headers show
Series [1/9] usb: dwc3: meson-g12a: add IRQ check | expand

Commit Message

Sergey Shtylyov Aug. 8, 2021, 8:37 p.m. UTC 
The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to devm_request_threaded_irq()
(which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding
an original error code. Stop calling devm_request_threaded_irq() with the
invalid IRQ #s.

Fixes: f90db10779ad ("usb: dwc3: meson-g12a: Add support for IRQ based OTG switching")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>

---
 drivers/usb/dwc3/dwc3-meson-g12a.c |    2 ++
 1 file changed, 2 insertions(+)

Comments

Martin Blumenstingl Aug. 8, 2021, 8:50 p.m. UTC | #1 
Hi Sergey,

On Sun, Aug 8, 2021 at 10:37 PM Sergey Shtylyov <s.shtylyov@omp.ru> wrote:
>
> The driver neglects to check the result of platform_get_irq()'s call and
> blithely passes the negative error codes to devm_request_threaded_irq()
> (which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding
> an original error code. Stop calling devm_request_threaded_irq() with the
> invalid IRQ #s.
>
> Fixes: f90db10779ad ("usb: dwc3: meson-g12a: Add support for IRQ based OTG switching")
> Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Thanks for spotting and fixing this issue!
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Felipe Balbi Aug. 9, 2021, 10:08 a.m. UTC | #2 
Sergey Shtylyov <s.shtylyov@omp.ru> writes:

> The driver neglects to check the result of platform_get_irq()'s call and
> blithely passes the negative error codes to devm_request_threaded_irq()
> (which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding
> an original error code. Stop calling devm_request_threaded_irq() with the
> invalid IRQ #s.
>
> Fixes: f90db10779ad ("usb: dwc3: meson-g12a: Add support for IRQ based OTG switching")
> Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>

Acked-by: Felipe Balbi <balbi@kernel.org>
diff mbox series

Patch

Index: usb/drivers/usb/dwc3/dwc3-meson-g12a.c
===================================================================
--- usb.orig/drivers/usb/dwc3/dwc3-meson-g12a.c
+++ usb/drivers/usb/dwc3/dwc3-meson-g12a.c
@@ -598,6 +598,8 @@  static int dwc3_meson_g12a_otg_init(stru
 				   USB_R5_ID_DIG_IRQ, 0);
 
 		irq = platform_get_irq(pdev, 0);
+		if (irq < 0)
+			return irq;
 		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 						dwc3_meson_g12a_irq_thread,
 						IRQF_ONESHOT, pdev->name, priv);