]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: bee4588) | patch
sata_mv: don't read hc_irq_cause
authorMark Lord <liml@rtr.ca>
Mon, 19 Jan 2009 23:05:42 +0000 (18:05 -0500)
committerJeff Garzik <jgarzik@redhat.com>
Mon, 26 Jan 2009 11:36:53 +0000 (06:36 -0500)
commitb43ca5fa1509db325b46a59bc4fd56f7165c0324
tree14c8706bb6a6a8135b12b66623e005df825b454ftree | snapshot
parentbee4588123ee897abc925de4a0a0fdc602ed7363commit | diff
sata_mv: don't read hc_irq_cause

Remove silly read-modify-write sequences when clearing interrupts
in hc_irq_cause.  This gets rid of unneeded MMIO reads, resulting in
a slight performance boost when switching between EDMA and non-EDMA
modes (eg. for cache flushes).

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
drivers/ata/sata_mv.c diff | blob | history
Linux Kernel Source Tree.