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Subject[PATCH v3 0/3] Bring the BusLogic host bus adapter driver up to Y2021
Hi,

Or was it Y2022?

Anyway, here's v3 of the series, with original patches 1/5 and 2/5
removed as they have since gone in (thanks!). No code or description
change with the remaining patches, just a mechanical regeneration, except
for Nick's Tested-by annotation for 3/3 (thanks!). Parts of the original
cover letter follow that are still relevant, for reference.

So we are here owing to Christoph's recent ISA bounce buffering sweep:
<https://lore.kernel.org/linux-scsi/20210331073001.46776-1-hch@lst.de/T/#m981284e74e93216626a0728ce1601ca18fca92e8>
which has prompted me to verify the current version of Linux with my old
server, which has been long equipped with venerable Linux 2.6.18 and which
I now have available for general experimenting, and the BusLogic BT-958
PCI SCSI host bus adapter the server has used for 20-something years now.
This revealed an issue with the BusLogic driver.

It has become obvious the BusLogic driver would have been non-functional,
should I have upgraded the kernel, at least with this configuration for
some 8 years now, and the underlying cause has been a long-known issue
with the MultiMaster firmware I have dealt with already, back in 2003.
To put it short the firmware cannot cope with commands that request an
allocation length exceeding the length of actual data returned.

I have originally observed it with a LOG SENSE command in the course of
investigating why smartmontools bring the system to a death, and worked it
around: <https://sourceforge.net/p/smartmontools/mailman/message/4993087/>
by issuing the command twice, first just to obtain the allocation length
required. As it turns out we need a similar workaround in the kernel now.

But in the course of investigating this issue I have discovered there is
a second bottom to it and hence I have prepared follow-up changes to
address problems with our handling of Vital Product Data INQUIRY pages.

See individual change descriptions for further details.

Any questions, comments, concerns still? Otherwise please apply.

Maciej

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