[PATCH v2] usbip: Fix vhci_urb_enqueue() URB null transfer buffer error path

From: Shuah Khan
Date: Thu Jan 24 2019 - 16:46:47 EST


Fix vhci_urb_enqueue() to print debug msg and return error instead of
failing with BUG_ON.

Signed-off-by: Shuah Khan <shuah@xxxxxxxxxx>
---
drivers/usb/usbip/vhci_hcd.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 1e592ec94ba4..f46ee1fefe02 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -702,8 +702,10 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag
}
vdev = &vhci_hcd->vdev[portnum-1];

- /* patch to usb_sg_init() is in 2.5.60 */
- BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
+ if (!urb->transfer_buffer && urb->transfer_buffer_length) {
+ dev_dbg(dev, "Null URB transfer buffer\n");
+ return -EINVAL;
+ }

spin_lock_irqsave(&vhci->lock, flags);

--
2.17.1