>>>>> "Tom" == Tom Yan <tom.t...@gmail.com> writes:

Tom,

Tom> Sounds like libata-scsi is doing something wrong then. It should
Tom> not set max_hw_sectors to dev->max_sectors that is set by
Tom> libata-core:

Tom> but instead it should report it as Maximum Transfer Length and let
Tom> sd set it as max_dev_sectors:

Well, it's mostly academic since there is a 1:1 mapping. It is important
in SCSI where you have many devices with different properties hooked up
to the same controller.

SCSI MTL is a recent addition. There wasn't much point in making a
distinction between hw and dev outside of sd.c since it is the only
device type that has a way to communicate a transfer limit.

Tom> Although that means setting dev->max_sectors to a value larger than
Tom> 1024 will probably be a no-op, if that's really an issue, we should
Tom> have the host templates in libata updated.

I am still not sure exactly which problem it is you are trying to fix?

-- 
Martin K. Petersen      Oracle Linux Engineering
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