korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-15 06:55:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

xhci: Don't submit commands when the host is dead.

Browse Source 
When the xHCI host controller dies, the USB core may attempt to reset the
devices to their default configuration before disconnecting them.  This
causes calls into the xHCI bandwidth allocation functions.  Don't allow
those functions to submit commands or work on xHCI structures if the host
controller is marked as dying.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Sarah Sharp 2011-05-23 16:41:17 -07:00
parent 0714a57c68
commit fe6c6c13d8
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/usb/host/xhci.c
View File

@ -1314,8 +1314,10 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
if (xhci->xhc_state & XHCI_STATE_DYING)
return -ENODEV;
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
drop_flag = xhci_get_endpoint_flag(&ep->desc);
if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) {
xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n",
@ -1401,6 +1403,8 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
return ret;
}
xhci = hcd_to_xhci(hcd);
if (xhci->xhc_state & XHCI_STATE_DYING)
return -ENODEV;
added_ctxs = xhci_get_endpoint_flag(&ep->desc);
last_ctx = xhci_last_valid_endpoint(added_ctxs);
@ -1676,6 +1680,8 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
if (xhci->xhc_state & XHCI_STATE_DYING)
return -ENODEV;
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
virt_dev = xhci->devs[udev->slot_id];