diff options
Diffstat (limited to 'drivers/usb/usbip/vhci_hcd.c')
| -rw-r--r-- | drivers/usb/usbip/vhci_hcd.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 000ab7225717..65850e9c7190 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -697,7 +697,8 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag } vdev = &vhci_hcd->vdev[portnum-1]; - if (!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; } @@ -1143,6 +1144,15 @@ 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; } @@ -1185,12 +1195,12 @@ static int vhci_start(struct usb_hcd *hcd) if (id == 0 && usb_hcd_is_primary_hcd(hcd)) { err = vhci_init_attr_group(); if (err) { - pr_err("init attr group\n"); + dev_err(hcd_dev(hcd), "init attr group failed, err = %d\n", err); return err; } err = sysfs_create_group(&hcd_dev(hcd)->kobj, &vhci_attr_group); if (err) { - pr_err("create sysfs files\n"); + dev_err(hcd_dev(hcd), "create sysfs files failed, err = %d\n", err); vhci_finish_attr_group(); return err; } |