diff options
Diffstat (limited to 'drivers/usb/usbip/vhci_hcd.c')
| -rw-r--r-- | drivers/usb/usbip/vhci_hcd.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 84e2d7edaa5c..253e0affd396 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -716,8 +716,11 @@ 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->num_sgs && + urb->transfer_buffer_length) { + dev_dbg(dev, "Null URB transfer buffer\n"); + return -EINVAL; + } spin_lock_irqsave(&vhci->lock, flags); @@ -1160,6 +1163,15 @@ static int vhci_setup(struct usb_hcd *hcd) hcd->speed = HCD_USB3; hcd->self.root_hub->speed = USB_SPEED_SUPER; } + + /* + * Support SG. + * sg_tablesize is an arbitrary value to alleviate memory pressure + * on the host. + */ + hcd->self.sg_tablesize = 32; + hcd->self.no_sg_constraint = 1; + return 0; } |