[PATCH] libata: implement ata_wait_register()

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As waiting for some register bits to change seems to be a common
operation shared by some controllers, implement helper function
ata_wait_register().  This function also takes care of register write
flushing.

Note that the condition is inverted, the wait is over when the masked
value does NOT match @val.  As we're waiting for bits to change, this
test is more powerful and allows the function to be used in more
places.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

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Tejun Heo 2006-04-11 22:22:29 +09:00 • committed by Jeff Garzik

parent 643be977f9

commit c22daff410

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47

drivers/scsi/libata-core.c

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3

include/linux/libata.h

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