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| author | Mark Lord <mlord@pobox.com> | 2009-02-25 15:15:39 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-03-24 22:02:40 -0400 |
| commit | 42ed893d8011264f9945c2f54055b47c298ac53e (patch) | |
| tree | 1923c308e4b103960b9fefb24c51e50a91739a4e /drivers/ata | |
| parent | c01e8a23128c746f23088db836bd4c820f3eb0b4 (diff) | |
| download | kernel_samsung_smdk4412-42ed893d8011264f9945c2f54055b47c298ac53e.tar.gz kernel_samsung_smdk4412-42ed893d8011264f9945c2f54055b47c298ac53e.tar.bz2 kernel_samsung_smdk4412-42ed893d8011264f9945c2f54055b47c298ac53e.zip | |
[libata] sata_mv: Tighten up interrupt masking in mv_qc_issue()
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>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/sata_mv.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 3bfe721ba76..b74af945a2f 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -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) |