[Bug 215101] [ixgbe] Intel X552 SFP+ fails to initialize when no SFP module is plugged in

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215101

            Bug ID: 215101
           Summary: [ixgbe] Intel X552 SFP+ fails to initialize when no
                    SFP module is plugged in
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: mike at belopuhov.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Created attachment 177725
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=177725&action=edit
Fix

Due to the insufficient error handling Intel X552 SFP+ (8086:15ac)
will fail to initialize on boot when no modules are plugged in and
become completely unusable afterwards.

I have discovered this bug on OpenBSD when updating our driver so
there's a chance that this is not an issue on FreeBSD (I haven't
tested), so you may consider this just a heads up.

I'm attaching the fix that makes it operational on OpenBSD.  This
chunk is based on the similar one for 82599.  Setting PHY type to
"ixgbe_phy_none" will come in handy during "ifconfig up" since
ixgbe_init[_locked] will re-do the PHY/SFP initialization if the
PHY type has been previously set to "none".

Cheers,
Mike

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