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i40e: Error handling for link event

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There exists an intermittent bug which causes the 'Link Detected'
field reported by the 'ethtool <iface>' command to be 'Yes' when
in fact, there is no link. This patch fixes the problem by
enabling temporary link polling when i40e_get_link_status returns
an error. This causes the driver to remember that an admin queue
command failed and polls, until the function returns with a success.

Change-Id: I64c69b008db4017b8729f3fc27b8f65c8fe2eaa0
Signed-off-by: Harshitha Ramamurthy <harshitha.ramamurthy@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Harshitha Ramamurthy
2016-12-12 15:44:16 -08:00
committed by Jeff Kirsher
parent 5cb259016b
commit ae13670824
2 changed files with 13 additions and 2 deletions
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drivers/net/ethernet/intel/i40e/i40e.h
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@@ -349,6 +349,7 @@ struct i40e_pf {
#define I40E_FLAG_HAVE_CRT_RETIMER BIT_ULL(52)
#define I40E_FLAG_PTP_L4_CAPABLE BIT_ULL(53)
#define I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE BIT_ULL(54)
#define I40E_FLAG_TEMP_LINK_POLLING BIT_ULL(55)
/* tracks features that get auto disabled by errors */
u64 auto_disable_flags;