e1000e: log when swflag is cleared unexpectedly on ICH/PCH devices
authorBruce Allan <bruce.w.allan@intel.com>
Fri, 13 May 2011 07:19:53 +0000 (07:19 +0000)
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>
Fri, 10 Jun 2011 03:32:28 +0000 (20:32 -0700)
commitc5caf4825b22957e4ad70fd94316e91ce8cfb51c
treecdd685b91226fc8ca16bc3d9278dba3e39d88662
parent99730e4c13c8344b02dd96108945b48d28c14c25
e1000e: log when swflag is cleared unexpectedly on ICH/PCH devices

Since EXTCNF_CTRL.SWFLAG (used in the ownership arbitration of shared
resources, e.g. the PHY shared between the s/w, f/w, and h/w clients)
can be cleared by any of those clients, log a debug message when
software attempts to clear it and it is already cleared unexpectedly.
And since the swflag is cleared by a hardware reset, the driver does
not need to do that, but the mutex acquired when the bit is set must
still be cleared.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
drivers/net/e1000e/ich8lan.c