[Bug 208022] ixgbe - unexpected "ix0: Invalid advertised speed; valid modes are 0x1 through 0x7" at boot time

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208022

            Bug ID: 208022
           Summary: ixgbe - unexpected "ix0: Invalid advertised speed;
                    valid modes are 0x1 through 0x7" at boot time
           Product: Base System
           Version: 10.3-BETA2
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: terry-freebsd at glaver.org
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Created attachment 168236
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=168236&action=edit
Example console messages and sysctl values

Somewhere along the line, the ixgbe driver started printing an unexpected "ix0:
Invalid advertised speed; valid modes are 0x1 through 0x7" at boot time as
shown in the attachment. The hardware is a retail Intel X540-T1 card at the
latest firmware revision. The two (why two?) sysctls in the attachment are at
their default value. The 2.8.3 driver in earlier 10.3 builds didn't do this, so
it is probably due to something in the 3.1.13-k import.

The message seems harmless, but should probably be fixed. Note that simply
changing the default value of one / both sysctls may not have the desired
effect - a quick look in the driver source shows a bunch of potential error
messages when trying to select the advertised speed on (for example) fiber
ports.

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