i40e: Retry AQC GetPhyAbilities to overcome I2CRead hangs

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- When the I2C is busy, the PHY reads are delayed.  The firmware will
  return EGAIN in these cases with an expectation that the SW will
  trigger the reads again
- This patch retries the operation for a maximum period of 500ms

Signed-off-by: Jayaprakash Shanmugam <jayaprakash.shanmugam@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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Jayaprakash Shanmugam 2017-09-07 08:05:55 -04:00 • committed by Jeff Kirsher

parent b861fb762a

commit 4988410f8d

3 changed files with 35 additions and 13 deletions

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42

drivers/net/ethernet/intel/i40e/i40e_common.c

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3

drivers/net/ethernet/intel/i40e/i40e_type.h

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3

drivers/net/ethernet/intel/i40evf/i40e_type.h

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