From 683b44b2d70292477899343a4cd81779325bfccc Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 26 Sep 2007 23:02:52 +0100 Subject: [PATCH] --- yaml --- r: 68127 b: refs/heads/master c: 21d2c925d3da6aabf9a0b34e95787202379f682a h: refs/heads/master i: 68125: db9005ebc69f2b41a8271885222fc7a91e2b92a1 68123: 5f636489e42e249c2b9ad90aada66ec6f3ca00ee 68119: 25a51c0649464fb4b966035019ad106ae5934cbf 68111: cb3e121f09ef89e4ccef8a1baaf1ae46a78098b5 68095: 0004d0fec4c59b678241a188f00626b0fef8a40c v: v3 --- [refs] | 2 +- trunk/drivers/ata/pata_atiixp.c | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/[refs] b/[refs] index 0841a6159a46..e09055b5cd66 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 3cc3eb1148e4b2dfabf7a1dcf36fd8be1331ca95 +refs/heads/master: 21d2c925d3da6aabf9a0b34e95787202379f682a diff --git a/trunk/drivers/ata/pata_atiixp.c b/trunk/drivers/ata/pata_atiixp.c index 95ed3071a0a0..9623f5295530 100644 --- a/trunk/drivers/ata/pata_atiixp.c +++ b/trunk/drivers/ata/pata_atiixp.c @@ -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)