| Message ID | 20211026173943.6829-4-s.shtylyov@omp.ru (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Explicitly deny IRQ0 in the USB host drivers | expand |
diff --git a/drivers/usb/host/ehci-npcm7xx.c b/drivers/usb/host/ehci-npcm7xx.c index 6b5a7a873e01..aff3d906ced5 100644 --- a/drivers/usb/host/ehci-npcm7xx.c +++ b/drivers/usb/host/ehci-npcm7xx.c @@ -114,6 +114,10 @@ static int npcm7xx_ehci_hcd_drv_probe(struct platform_device *pdev) retval = irq; goto fail; } + if (!irq) { + retval = -EINVAL; + goto fail; + } /* * Right now device-tree probed devices don't get dma_mask set.
If platform_get_irq() returns IRQ0 (considered invalid according to Linus) the driver blithely passes it to usb_add_hcd() that treats IRQ0 as no IRQ at all. Deny IRQ0 right away, returning -EINVAL from the probe() method... Fixes: df44831ee2dd ("USB host: Add USB ehci support for nuvoton npcm7xx platform") Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru> Acked-by: Alan Stern <stern@rowland.harvard.edu> Reviewed-by: Avi Fishman <avifishman70@gmail.com> --- Changes in version 2: - added Alan's ACK and also Avi's tag. drivers/usb/host/ehci-npcm7xx.c | 4 ++++ 1 file changed, 4 insertions(+)