Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
diff -u --new-file --exclude-from /usr/src/exclude --recursive linux.vanilla-2.6.23rc8-mm1/drivers/ata/pata_atiixp.c linux-2.6.23rc8-mm1/drivers/ata/pata_atiixp.c --- linux.vanilla-2.6.23rc8-mm1/drivers/ata/pata_atiixp.c 2007-09-26 16:46:48.000000000 +0100 +++ linux-2.6.23rc8-mm1/drivers/ata/pata_atiixp.c 2007-09-25 23:59:17.000000000 +0100 @@ -173,6 +173,9 @@ * * 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 @@ * * 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) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
