Several parts of usbnet rely on dev->maxpacket not being set to 0 to
prevent division by zero errors.
This adds validation of the dev->maxpacket value being non-zero before
treating the device probe as successful.
Signed-off-by: Toby Gray <toby.gray@xxxxxxxxxxx>
---
drivers/net/usb/usbnet.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 4ccd316..1491c90 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1427,6 +1427,10 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
dev->rx_urb_size = dev->hard_mtu;
if (!dev->maxpacket)
dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
+ if (!dev->maxpacket) {
+ status = -ENODEV;
+ goto out3;
+ }
if ((dev->driver_info->flags & FLAG_WLAN) != 0)
SET_NETDEV_DEVTYPE(net, &wlan_type);
--
1.7.0.4
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