Subject: Re: [PATCH] e1000e: MSI interrupt test failed, using legacy interrupt

From: Prasanna Panchamukhi <[email-masked]>
Date: Thu, 26 Apr 2012 17:42:19 -0700

On 04/26/2012 05:20 PM, Jeff Kirsher wrote:
> On 04/26/2012 05:05 PM, [email-masked] wrote:
>> From: Prasanna S. Panchamukhi<[email-masked]>
>>
>> Following logs where seen on Systems with multiple NICs&  ports,
>> while using MSI interrupts as shown below:
>>
>> Feb 16 15:09:32 (none) user.notice kernel: 0000:00:0d.0: lan0_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:32 (none) user.notice kernel: 0000:40:0d.0: wan0_1: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:32 (none) user.notice kernel: 0000:40:0d.0: lan0_1: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:32 (none) user.warn kernel: 0000:40:0e.0: wan4_0: MSI interrupt
>> test failed, using legacy interrupt.
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> Feb 16 15:09:32 (none) user.notice kernel: 0000:00:0e.0: wan1_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:33 (none) user.notice kernel: 0000:00:0e.0: lan1_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:33 (none) user.notice kernel: 0000:00:0f.0: wan2_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:33 (none) user.notice kernel: 0000:00:0f.0: lan2_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:33 (none) user.notice kernel: 0000:40:0a.0: wan3_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:33 (none) user.notice kernel: 0000:40:0a.0: lan3_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:34 (none) user.notice kernel: 0000:40:0e.0: lan4_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:34 (none) user.notice kernel: 0000:40:0f.0: wan5_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>> Feb 16 15:09:34 (none) user.notice kernel: 0000:40:0f.0: lan5_0: NIC Link is Up
>> 1000 Mbps Full Duplex, Flow Control: RX/TX
>>
>> This patch changes the IRQ tests to use polling loops starting with a
>> delay of 1 tick and doubling that if necessary up to a maximum total
>> delay of approximately 1 second.
>>
>> Signed-off-by: Prasanna S. Panchamukhi<[email-masked]>
>> ---
>>   drivers/net/ethernet/intel/e1000e/netdev.c |   27 +++++++++++++++++++++++----
>>   1 files changed, 23 insertions(+), 4 deletions(-)
> Thanks Prasanna, Dave did accept the previous patch, so does this patch
> take that into account?
No, If Dave has already accepted previous patch we can ignore this patch 
for now.

Thanks,
Prasanna