From: Tejun Heo <htejun@gmail.com>
Date: Tue, 11 Apr 2006 13:22:29 +0000 (+0900)
Subject: [PATCH] libata: implement ata_wait_register()
X-Git-Tag: v2.6.18-rc1~1079^2~121
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c22daff41001e9ccead87179ac0547f85447139e;p=pandora-kernel.git

[PATCH] libata: implement ata_wait_register()

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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