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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2011-05-23 16:41:17 -0700
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2011-05-25 15:23:35 -0700
commitfe6c6c13d8dcb32398eef143e2e8efc3fb4019bf (patch)
tree1e340233ee7136051a1dd4ec3d3b30327e9196d1 /drivers/usb
parent0714a57c6865f31ed3366e5abdfae7da580d41d2 (diff)
downloadop-kernel-dev-fe6c6c13d8dcb32398eef143e2e8efc3fb4019bf.zip
op-kernel-dev-fe6c6c13d8dcb32398eef143e2e8efc3fb4019bf.tar.gz
xhci: Don't submit commands when the host is dead.
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/xhci.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 8f2a56e..58183d2 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -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];
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