Problems with em0 driver after upgrade to r303832

[Doug Hardie]

> On 9 August 2016, at 04:40, Kurt Jaeger <lists at opsec.eu> wrote:
> 
> Hi!
> 
>> I upgraded my local machine to the above revision a few days ago. Since then I have seen the local em0 card locking up and getting he following
>> messages in dmesg
>> 
>> em0: Watchdog timeout -- resetting
>> em0: link state changed to DOWN
>> em0: link state changed to UP
>> 
>> 
>> I thought it was the physical card, but I have swapped this out
>> for a completely different one and the problems remain.
> 
> What does pciconf -lvb display for the PCI IDs for this card ?
> 
> If you use r303832, this is CURRENT (12.x) ? Then maybe the
> question should be discussed on current at freebsd.org.


I am seeing this on 11.0-BETA3/4.

bge0 at pci0:3:0:0:	class=0x020000 card=0x168614e4 chip=0x168614e4 rev=0x01 hdr=0x00
    vendor     = 'Broadcom Corporation'
    device     = 'NetXtreme BCM57766 Gigabit Ethernet PCIe'
    class      = network
    subclass   = ethernet
    bar   [10] = type Prefetchable Memory, range 64, base 0xa0700000, size 65536, enabled
    bar   [18] = type Prefetchable Memory, range 64, base 0xa0710000, size 65536, enabled

It does not occur on another machine with:

bge0 at pci0:2:0:0:	class=0x020000 card=0x16b414e4 chip=0x16b414e4 rev=0x10 hdr=0x00
    vendor     = 'Broadcom Corporation'
    device     = 'NetXtreme BCM57765 Gigabit Ethernet PCIe'
    class      = network
    subclass   = ethernet
    bar   [10] = type Prefetchable Memory, range 64, base 0x90400000, size 65536, enabled
    bar   [18] = type Prefetchable Memory, range 64, base 0x90410000, size 65536, enabled