Re: 82571EB: Detected Hardware Unit Hang

On Sun, 2012-07-15 at 10:35 -0300, Henrique de Moraes Holschuh wrote:

On Sun, 15 Jul 2012, Dave, Tushar N wrote:

quoted

Somehow setting max payload to 256 from BIOS does not set this value for all devices. I believe this is a BIOS bug.

And preferably, Linux should complain about it.  Since we know it is going
to cause problems, and since we know it does happen, we should be raising a
ruckus about it in the kernel log (and probably fixing it to min(path) while
at it)...

Is this something that should be raised as a feature request with the
PCI/PCIe subsystem?

The feature is there, but we ended up with:

commit 5f39e6705faade2e89d119958a8c51b9b6e2c53c
Author: Jon Mason [off-list ref]
Date:   Mon Oct 3 09:50:20 2011 -0500

    PCI: Disable MPS configuration by default

But you are welcome to share use of the fixup_mpss_256() quirk.

Ben.

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Ben Hutchings, Staff Engineer, Solarflare
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