shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-03 01:36:52 +09:00
Code Issues Packages Projects Releases Wiki Activity

xHCI: Clear PLC for USB2 root hub ports

Browse Source 
commit 6fd4562178 upstream.

When the link state changes, xHC will report a port status change event
and set the PORT_PLC bit, for both USB3 and USB2 root hub ports.

The PLC will be cleared by usbcore for USB3 root hub ports, but not for
USB2 ports, because they do not report USB_PORT_STAT_C_LINK_STATE in
wPortChange.

Clear it for USB2 root hub ports in handle_port_status().

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andiry Xu
2011-09-23 14:19:50 -07:00
committed by Greg Kroah-Hartman
parent 1c349398c8
commit 6d3607b179
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/host/xhci-ring.c
View File

@@ -1359,6 +1359,10 @@ static void handle_port_status(struct xhci_hcd *xhci,
}
}
if (hcd->speed != HCD_USB3)
xhci_test_and_clear_bit(xhci, port_array, faked_port_index,
PORT_PLC);
cleanup:
/* Update event ring dequeue pointer before dropping the lock */
inc_deq(xhci, xhci->event_ring, true);