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authorGreg Rose <gregory.v.rose@intel.com>2010-03-19 02:59:52 +0000
committerDavid S. Miller <davem@davemloft.net>2010-03-19 21:00:44 -0700
commit33bd9f601ea21c4389870e425ae4eaf210d49b95 (patch)
tree067d6e6dc6de15b4dc56064ad31b67770e98a9fa /Documentation/gpio.txt
parentfd3686a842717b890fbe3024b83a616c54d5dba0 (diff)
ixgbevf: Fix VF Stats accounting after reset
The counters in the 82599 Virtual Function are not clear on read. They accumulate to the maximum value and then roll over. They are also not cleared when the VF executes a soft reset, so it is possible they are non-zero when the driver loads and starts. This has all been accounted for in the code that keeps the stats up to date but there is one case that is not. When the PF driver is reset the counters in the VF are all reset to zero. This adds an additional accounting overhead into the VF driver when the PF is reset under its feet. This patch adds additional counters that are used by the VF driver to accumulate and save stats after a PF reset has been detected. Prior to this patch displaying the stats in the VF after the PF has reset would show bogus data. Signed-off-by: Greg Rose <gregory.v.rose@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/gpio.txt')
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