tree 374412711d20bdeb0a925c3b92c9f2f1cdf851e6
parent fcf8f576beafb8c5db8aee8a73eb73763fa7b0ad
author Sarah Sharp <sarah.a.sharp@linux.intel.com> 1248721467 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1248816672 -0700

USB: xhci: Setup HW retries correctly.

The xHCI host controller can be programmed to retry a transfer a certain number
of times per endpoint before it passes back an error condition to the host
controller driver.  The xHC will return an error code when the error count
transitions from 1 to 0.  Programming an error count of 3 means the xHC tries
the transfer 3 times, programming it with a 1 means it tries to transfer once,
and programming it with 0 means the HW tries the transfer infinitely.

We want isochronous transfers to only be tried once, so set the error count to
one.

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