netdev - pch_gbe: backport fails to start sending

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Date:	Thu, 24 May 2012 13:05:05 -0700
From:	"Andy Cress" <andy.cress@...kontron.com>
To:	<netdev@...r.kernel.org>
Subject: pch_gbe:  backport fails to start sending

Folks,

I now have a different case where the pch_gbe driver needs help.
I have backported the pch_gbe git head (v1.00) to kernel 2.6.32
(RHEL6.2) and when it loads, after the open completes and the link is
up, it fails to start sending and receiving.  
I also took the pch_gbe source which runs fine on 2.6.38 (Fedora 15) and
backported it, and get the same results. 
The much bulkier pch_gbe 0.91-NAPI driver does run on 2.6.32 (RHEL6.2)
but is not maintained.
I also tried backporting the mii.c from the 2.6.38 kernel, but that
didn't help, got the same symptoms.

After adding -DDEBUG to the 1.00 driver, I can see that it seems to get
just DMA Complete interrupts when it should be getting Transmit
complete, etc.   I'm not sure why it gets stuck there.  
Any ideas/input is welcome.  

Andy  

https://sendfile.kontron.com/message/KJKmrf171EhsuvbyhjnXpe 
Attached at this link are two files:  
 pch_gbe-100a.tar.gz = the backported pch_gbe 1.00 head source, includes
patches that were applied.  
 dmesg.tar.gz  =  Some dmesg output from test cases with debug:
   dmesg-pch10a-kern2632-bad.txt = backported 1.00 from git head on
kernel 2.6.32, fails
   dmesg-pch10-kern2632-bad.txt  = backported 1.00 from Fedora 15 on
kernel 2.6.32, fails
   dmesg-pch10-kern2638-good.txt = same 1.00 source from Fedora 15 on
kernel 2.6.38, works

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