diff options
| author | Sergey Shtylyov <s.shtylyov@omp.ru> | 2021-08-09 23:27:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-13 09:02:34 +0200 |
| commit | 50855c31573b02963f0aa2aacfd4ea41c31ae0e0 (patch) | |
| tree | d850e094b7ff55f7d924cb3b951555da0c978663 /drivers/usb/gadget | |
| parent | 175006956740f70ca23394c58f8d7804776741bd (diff) | |
| download | linux-50855c31573b02963f0aa2aacfd4ea41c31ae0e0.tar.gz | |
usb: gadget: udc: at91: add IRQ check
The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to devm_request_irq() (which takes
*unsigned* IRQ #), causing it to fail with -EINVAL, overriding an original
error code. Stop calling devm_request_irq() with the invalid IRQ #s.
Fixes: 8b2e76687b39 ("USB: AT91 UDC updates, mostly power management")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Acked-by: Felipe Balbi <balbi@kernel.org>
Link: https://lore.kernel.org/r/6654a224-739a-1a80-12f0-76d920f87b6c@omp.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/udc/at91_udc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/gadget/udc/at91_udc.c b/drivers/usb/gadget/udc/at91_udc.c index eede5cedacb4..d9ad9adf7348 100644 --- a/drivers/usb/gadget/udc/at91_udc.c +++ b/drivers/usb/gadget/udc/at91_udc.c @@ -1876,7 +1876,9 @@ static int at91udc_probe(struct platform_device *pdev) clk_disable(udc->iclk); /* request UDC and maybe VBUS irqs */ - udc->udp_irq = platform_get_irq(pdev, 0); + udc->udp_irq = retval = platform_get_irq(pdev, 0); + if (retval < 0) + goto err_unprepare_iclk; retval = devm_request_irq(dev, udc->udp_irq, at91_udc_irq, 0, driver_name, udc); if (retval) { |