tree 14f198d776b386c56dc6eb3065227c579ab54a58
parent 4e833c0b87a30798e67f06120cecebef6ee9644c
author Sarah Sharp <sarah.a.sharp@linux.intel.com> 1331927900 -0700
committer Sarah Sharp <sarah.a.sharp@linux.intel.com> 1334158134 -0700

xhci: Warn when hosts don't halt.

Eric Fu reports a problem with his VIA host controller fetching a zeroed
event ring pointer on resume from suspend.  The host should have been
halted, but we can't be sure because that code ignores the return value
from xhci_halt().  Print a warning when the host controller refuses to
halt within XHCI_MAX_HALT_USEC (currently 16 seconds).

(Update: it turns out that the VIA host controller is reporting a halted
state when it fetches the zeroed event ring pointer.  However, we still
need this warning for other host controllers.)

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>