tree 8ee86fe0b3dffa0ebff4406f1470092c4df84f25
parent 904d6a303361a85bfa4c8181ef62a24edb8da0a8
author Stephen Hemminger <shemminger@vyatta.com> 1229620636 -0800
committer Jesse Barnes <jbarnes@virtuousgeek.org> 1231355596 -0800

PCI: handle long delays in VPD access

Accessing the VPD area can take a long time.  The existing
VPD access code fails consistently on my hardware. There are comments
in the SysKonnect vendor driver that it can take up to 13ms per word.

Change the access routines to:
  * use a mutex rather than spinning with IRQ's disabled and lock held
  * have a much longer timeout
  * call cond_resched while spinning

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>