pata-bf54x: Set ATAPI HSM to control IDE device terminate sequence.

Set ATAPI host state machine to control IDE device terminate sequence.
Some IDE harddisk may assert terminate sequence in the middle of a
formal DMA transaction and resume later. Bit DETECT_TERM in ATAPI_CTRL
register determines whether the ATAPI host state machine or the kernel
driver should take care of this case.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
index 9ab8973..5551610 100644 (file)
--- a/drivers/ata/pata_bf54x.c
+++ b/drivers/ata/pata_bf54x.c
@@ -911,7 +911,10 @@ static void bfin_bmdma_start(struct ata_queued_cmd *qc)
        /* Reset all transfer count */
        ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
 
-               /* Set transfer length to buffer len */
+       /* Set ATAPI state machine contorl in terminate sequence */
+       ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | END_ON_TERM);
+
+       /* Set transfer length to buffer len */
        for_each_sg(qc->sg, sg, qc->n_elem, si) {
                ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));
        }