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path: root/drivers/ata/pata_atiixp.c
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Diffstat (limited to 'drivers/ata/pata_atiixp.c')
-rw-r--r--drivers/ata/pata_atiixp.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 95ed3071a0a0..9623f5295530 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -173,6 +173,9 @@ static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
173 * 173 *
174 * When DMA begins we need to ensure that the UDMA control 174 * When DMA begins we need to ensure that the UDMA control
175 * register for the channel is correctly set. 175 * register for the channel is correctly set.
176 *
177 * Note: The host lock held by the libata layer protects
178 * us from two channels both trying to set DMA bits at once
176 */ 179 */
177 180
178static void atiixp_bmdma_start(struct ata_queued_cmd *qc) 181static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
@@ -199,6 +202,9 @@ static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
199 * 202 *
200 * DMA has completed. Clear the UDMA flag as the next operations will 203 * DMA has completed. Clear the UDMA flag as the next operations will
201 * be PIO ones not UDMA data transfer. 204 * be PIO ones not UDMA data transfer.
205 *
206 * Note: The host lock held by the libata layer protects
207 * us from two channels both trying to set DMA bits at once
202 */ 208 */
203 209
204static void atiixp_bmdma_stop(struct ata_queued_cmd *qc) 210static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)