PCI: handle long delays in VPD access

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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>

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Stephen Hemminger 2008-12-18 09:17:16 -08:00 • committed by Jesse Barnes

parent 904d6a3033

commit 1120f8b816

1 changed files with 33 additions and 22 deletions

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drivers/pci/access.c

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