Commit 06e7a148 authored Apr 29, 2009 by Sarah Sharp Committed by Greg Kroah-Hartman Jun 15, 2009

USB: xhci: Fix Link TRB handoff bit twiddling.



Make sure to preserve all bits *except* the TRB_CHAIN bit when giving a
Link TRB to the hardware.  We need to save things like TRB type and the
toggle bit in the control dword.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 3841d56e

drivers/usb/host/xhci-ring.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -188,7 +188,7 @@ static void inc_enq(struct xhci_hcd xhci, struct xhci_ring ring, bool consumer
		next->link.control &= (u32) ~TRB_CYCLE;
		else
		next->link.control \|= (u32) TRB_CYCLE;
		next->link.control &= TRB_CHAIN;
		next->link.control &= ~TRB_CHAIN;
		next->link.control \|= chain;
		}
		/* Toggle the cycle bit after the last ring segment. */