Aaron Lu 5416912af7 libata: set dma_mode to 0xff in reset
ata_device->dma_mode's initial value is zero, which is not a valid dma
mode, but ata_dma_enabled will return true for this value. This patch
sets dma_mode to 0xff in reset function, so that ata_dma_enabled will
not return true for this case, or it will cause problem for pata_acpi.

The corrsponding bugzilla page is at:
https://bugzilla.kernel.org/show_bug.cgi?id=49151

Reported-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Tested-by: Szymon Janc <szymon@janc.net.pl>
Tested-by: Dutra Julio <dutra.julio@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Cc: <stable@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-12-03 05:07:13 -05:00
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