tree 600bd461c66e9980c3dc3554148fb594e5805f5f
parent 8d2b450d0f9233f221d545f26720eebbc468e857
author Mark Lord <liml@rtr.ca> 1239636574 -0400
committer Jeff Garzik <jgarzik@redhat.com> 1240009468 -0400

sata_mv: workaround for multi_count errata sata24

Workaround for errata SATA#24 in sata_mv.
This errata affects WRITE_MULTI* commands when
the device multi_count produces a DRQ block size >= 4Kbytes.

We work around it here by converting such operations
into ordinary PIO_WRITEs instead.

Note that this might result in a PIO FUA write unavoidably being converted
into a non-FUA write.  In practice, any system using FUA is also going to be
using DMA rather than PIO, so this shouldn't affect anyone in the real world.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>