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(parent: c96a2b8) | patch
USB: xhci: Avoid compiler reordering in Link TRB giveback.
authorSarah Sharp <sarah.a.sharp@linux.intel.com>
Thu, 30 Apr 2009 02:05:58 +0000 (19:05 -0700)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 16 Jun 2009 04:44:50 +0000 (21:44 -0700)
commitb7116ebca4e1a898f30ae474151fd6474327257c
treec450c38cfc8464613e08cd3903f4b5d730b75549tree | snapshot
parentc96a2b81f3747e6924307714666aa2368bc1718bcommit | diff
USB: xhci: Avoid compiler reordering in Link TRB giveback.

Force the compiler to write the cycle bit of the Link TRB last.  This
ensures that the hardware doesn't think it owns the Link TRB before we set
the chain bit.  Reported by Oliver in this thread:
http://marc.info/?l=linux-usb&m=124091532410219&w=2

Reported-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/xhci-ring.c diff | blob | history
Full containers within linux kernel