qed: Fix link flap issue due to mismatching EEE capabilities.
authorSudarsana Reddy Kalluru <sudarsana.kalluru@cavium.com>
Thu, 19 Jul 2018 05:50:02 +0000 (22:50 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 5 Sep 2018 07:26:27 +0000 (09:26 +0200)
commit77c65d5f40c6979244eee3d4f51fa2a213c73307
tree8ee360fe591d556ad2c99fd02979485203bd8c06
parentb970d8a1c213d8f030feddb3cbf934df4302eb47
qed: Fix link flap issue due to mismatching EEE capabilities.

[ Upstream commit 4ad95a93a702ec4f4fb5159b822797ba67b8cbbe ]

Apparently, MFW publishes EEE capabilities even for Fiber-boards that don't
support them, and later since qed internally sets adv_caps it would cause
link-flap avoidance (LFA) to fail when driver would initiate the link.
This in turn delays the link, causing traffic to fail.

Driver has been modified to not to ask MFW for any EEE config if EEE isn't
to be enabled.

Fixes: 645874e5 ("qed: Add support for Energy efficient ethernet.")
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/ethernet/qlogic/qed/qed_mcp.c