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(parent: 78ab88f) | patch
ata_piix: verify SIDPR access before enabling it
authorTejun Heo <htejun@gmail.com>
Thu, 1 May 2008 01:03:08 +0000 (10:03 +0900)
committerJeff Garzik <jgarzik@redhat.com>
Tue, 6 May 2008 15:33:53 +0000 (11:33 -0400)
commitcb6716c879ecf49e2af344926c6a476821812061
treeed6f4ef6d78fe448aa8ec782b4eef6f83364aaa5tree
parent78ab88f04f44bed566d51dce0c7cbfeff6449a06commit | diff
ata_piix: verify SIDPR access before enabling it

On certain configurations (certain macbooks), even though all the
conditions for SIDPR access described in the datasheet are met,
actually reading those registers just returns 0 and have no effect on
write.  Verify SIDPR is actually working before enabling it.

This is reported by Ryan Roth in bz#10512.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Ryan Roth <ryan.roth@ch2m.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
drivers/ata/ata_piix.c diff | blob | history
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