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sata_sil24: Use memory barriers before issuing commands
authorCatalin Marinas <catalin.marinas@arm.com>
Thu, 10 Jun 2010 16:02:12 +0000 (17:02 +0100)
committerJeff Garzik <jgarzik@redhat.com>
Thu, 10 Jun 2010 20:06:48 +0000 (16:06 -0400)
commit1082345290dbc66c19877662cb24c18ee4ae1296
tree601a05fd1e26e161c4f60bef35dab7411dac0e5btree | snapshot (tar.bz2 tar.gz zip)
parent14e45c15e1dcc4d972b41343661683efd60fed72commit | diff
sata_sil24: Use memory barriers before issuing commands

The data in the cmd_block buffers may reach the main memory after the
writel() to the device ports. This patch introduces two calls to wmb()
to ensure the relative ordering.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Colin Tuckley <colin.tuckley@arm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
drivers/ata/sata_sil24.c diff | blob | blame | history
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