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[libata] sata_mv: Tighten up interrupt masking in mv_qc_issue()

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so that it doesn't miss any protocols.  Handle future cases where a
qc is specially marked for polled issue or where a particular chip
version prefers interrupts over polling for PIO.

This mimics the polling decision logic from ata_sff_qc_issue().

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2009-02-25 15:15:39 -05:00 committed by Jeff Garzik
parent c01e8a2312
commit 42ed893d80
1 changed files with 21 additions and 13 deletions
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34
drivers/ata/sata_mv.c
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@ -1809,7 +1809,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
void __iomem *port_mmio = mv_ap_base(ap);
struct mv_port_priv *pp = ap->private_data;
u32 in_index;
unsigned int port_irqs = DONE_IRQ | ERR_IRQ;
unsigned int port_irqs;
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
@ -1842,20 +1842,28 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
"this may fail due to h/w errata\n");
}
/* drop through */
case ATA_PROT_NODATA:
case ATAPI_PROT_PIO:
port_irqs = ERR_IRQ; /* leave DONE_IRQ masked for PIO */
/* drop through */
default:
/*
* We're about to send a non-EDMA capable command to the
* port. Turn off EDMA so there won't be problems accessing
* shadow block, etc registers.
*/
mv_stop_edma(ap);
mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), port_irqs);
mv_pmp_select(ap, qc->dev->link->pmp);
return ata_sff_qc_issue(qc);
case ATAPI_PROT_NODATA:
if (ap->flags & ATA_FLAG_PIO_POLLING)
qc->tf.flags |= ATA_TFLAG_POLLING;
break;
}
if (qc->tf.flags & ATA_TFLAG_POLLING)
port_irqs = ERR_IRQ; /* mask device interrupt when polling */
else
port_irqs = ERR_IRQ | DONE_IRQ; /* unmask all interrupts */
/*
* We're about to send a non-EDMA capable command to the
* port. Turn off EDMA so there won't be problems accessing
* shadow block, etc registers.
*/
mv_stop_edma(ap);
mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), port_irqs);
mv_pmp_select(ap, qc->dev->link->pmp);
return ata_sff_qc_issue(qc);
}
static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap)