usb: host: ohci-tmio: add IRQ check

The driver neglects to check the  result of platform_get_irq()'s call and
blithely passes the negative error codes to usb_add_hcd() (which takes
*unsigned* IRQ #), causing request_irq() that it calls to fail with
-EINVAL, overriding an original error code. Stop calling usb_add_hcd()
with the invalid IRQ #s.

Fixes: 78c73414f4f6 ("USB: ohci: add support for tmio-ohci cell")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/402e1a45-a0a4-0e08-566a-7ca1331506b1@omp.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index 7f857ba..08ec2ab 100644 (file)
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -202,6 +202,9 @@ static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
        if (!cell)
                return -EINVAL;
 
+       if (irq < 0)
+               return irq;
+
        hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
        if (!hcd) {
                ret = -ENOMEM;