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: 0cbd4b34cda9 ("xhci: mediatek: support MTK xHCI host controller") Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx> --- drivers/usb/host/xhci-mtk.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index c53f6f276d5c..d2dc8d9863ee 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -495,7 +495,7 @@ static int xhci_mtk_probe(struct platform_device *pdev) return ret; irq = platform_get_irq_byname_optional(pdev, "host"); - if (irq < 0) { + if (irq <= 0) { if (irq == -EPROBE_DEFER) return irq; @@ -503,6 +503,8 @@ static int xhci_mtk_probe(struct platform_device *pdev) irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; + if (!irq) + return -EINVAL; } wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup"); -- 2.26.3