diff mbox series

[v2,10/22] usb: host: ohci-exynos: deny IRQ0

Message ID 20211026173943.6829-11-s.shtylyov@omp.ru (mailing list archive)
State New, archived
Headers show
Series [v2,01/22] usb: host: ehci-exynos: deny IRQ0 | expand

Commit Message

Sergey Shtylyov Oct. 26, 2021, 5:39 p.m. UTC 
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: 1d4169834628 ("usb: host: ohci-exynos: Fix error handling in exynos_ohci_probe()")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
Changes in version 2:
- added Alan's ACK.

 drivers/usb/host/ohci-exynos.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 5f5e8a64c8e2..f28f28e42f43 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -175,6 +175,10 @@  static int exynos_ohci_probe(struct platform_device *pdev)
 		err = irq;
 		goto fail_io;
 	}
+	if (!irq) {
+		err = -EINVAL;
+		goto fail_io;
+	}
 
 	platform_set_drvdata(pdev, hcd);