[libata] sata_mv: cache frequently-accessed registers

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Maintain a local (mv_port_priv) cache of frequently accessed registers,
to avoid having to re-read them (very slow) on every transistion
between EDMA and non-EDMA modes.  This speeds up things like
flushing the drive write cache, and anything using basic DMA transfers.

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

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Mark Lord 2009-02-25 15:13:03 -05:00 • committed by Jeff Garzik

parent a5bfc4714b

commit 08da175937

1 changed files with 70 additions and 21 deletions

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drivers/ata/sata_mv.c

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