libata-sff: Fix documentation

Code moved to ioread/iowrite but the comment didn't
Also note a posting issue

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 1cce2198baa..8023167bbbe 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -297,7 +297,7 @@ void ata_bmdma_start (struct ata_queued_cmd *qc)
         dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
         iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
 
-        /* Strictly, one may wish to issue a readb() here, to
+        /* Strictly, one may wish to issue an ioread8() here, to
          * flush the mmio write.  However, control also passes
          * to the hardware at this point, and it will interrupt
          * us when we are to resume control.  So, in effect,
@@ -307,6 +307,9 @@ void ata_bmdma_start (struct ata_queued_cmd *qc)
          * is expected, so I think it is best to not add a readb()
          * without first all the MMIO ATA cards/mobos.
          * Or maybe I'm just being paranoid.
+         *
+         * FIXME: The posting of this write means I/O starts are
+         * unneccessarily delayed for MMIO
          */
 }