[PATCH v2 01/22] usb: host: ehci-exynos: deny IRQ0

[Sergey Shtylyov]

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: 44ed240d6273 ("usb: host: ehci-exynos: Fix error check in exynos_ehci_probe()")
Signed-off-by: Sergey Shtylyov <s.shtylyov at omp.ru>
Acked-by: Alan Stern <stern at rowland.harvard.edu>
---
Changes in version 2:
- added Alan's ACK.

 drivers/usb/host/ehci-exynos.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 1a9b7572e17f..ff4e1261801a 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -207,6 +207,10 @@ static int exynos_ehci_probe(struct platform_device *pdev)
 		err = irq;
 		goto fail_io;
 	}
+	if (!irq) {
+		err = -EINVAL;
+		goto fail_io;
+	}
 
 	err = exynos_ehci_phy_enable(&pdev->dev);
 	if (err) {
-- 
2.26.3