[Bug 14831] mptsas - Use of ATA command pass-through results in unreliable operation - drive / controller resets

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https://bugzilla.kernel.org/show_bug.cgi?id=14831


Ryan Kuester <rkuester@xxxxxxxxxx> changed:

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--- Comment #15 from Ryan Kuester <rkuester@xxxxxxxxxx>  2010-05-03 22:22:06 ---
Take a look at my diagnosis here:
http://lkml.org/lkml/2010/4/26/335

It includes a rough-draft patch.  I'd be very interested in hearing reports of
whether this fixes this smartctl issue in others' environments as it has in
mine.

The reason I haven't proposed it as a real patch is that there's probably a
better location for that code.  Where I have it, it'll apply to every SCSI host
using the MPT Fusion framework, and if it's a hardware bug, perhaps we want it
to apply only to this specific LSI 1068 controller.

That said, I expect most requests hitting the device are already well-aligned,
so this wouldn't affect many requests even if it did apply to a
broader-than-necessary collection of hardware.

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