[PATCH] sata_nv ADMA/NCQ support for nForce4
This patch adds support for ADMA mode on NVIDIA nForce4 (CK804/MCP04) SATA
controllers to the sata_nv driver. Benefits of ADMA mode include:
- NCQ support
- Reduced CPU overhead (controller DMAs command information from memory
instead of them being pushed in by the CPU)
- Full 64-bit DMA support
ADMA mode is enabled by default in this version. To disable it, set the
module parameter adma_enabled=0.
Signed-off-by: Robert Hancock <hancockr@shaw.ca>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 7645f2b..e178d6a 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -732,7 +732,7 @@
qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {
u8 host_stat;
- host_stat = ata_bmdma_status(ap);
+ host_stat = ap->ops->bmdma_status(ap);
ata_ehi_push_desc(&ehc->i, "BMDMA stat 0x%x", host_stat);