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pata_atiixp: Audit notes on locking

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Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2007-09-26 23:02:52 +01:00 committed by Jeff Garzik
parent 3cc3eb1148
commit 21d2c925d3
1 changed files with 6 additions and 0 deletions
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6
drivers/ata/pata_atiixp.c
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@ -173,6 +173,9 @@ static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
*
* When DMA begins we need to ensure that the UDMA control
* register for the channel is correctly set.
*
* Note: The host lock held by the libata layer protects
* us from two channels both trying to set DMA bits at once
*/
static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
@ -199,6 +202,9 @@ static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
*
* DMA has completed. Clear the UDMA flag as the next operations will
* be PIO ones not UDMA data transfer.
*
* Note: The host lock held by the libata layer protects
* us from two channels both trying to set DMA bits at once
*/
static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)