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sata_mv new mv_port_intr function

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Separate out the inner loop body of mv_host_intr()
into it's own function called mv_port_intr().

This should help maintainabilty.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2008-05-02 02:14:02 -04:00 committed by Jeff Garzik
parent eabd5eb1cb
commit a90103298f
1 changed files with 49 additions and 37 deletions
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86
drivers/ata/sata_mv.c
View file

@ -1591,25 +1591,22 @@ static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap)
return qc;
}
static void mv_unexpected_intr(struct ata_port *ap)
static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled)
{
struct mv_port_priv *pp = ap->private_data;
struct ata_eh_info *ehi = &ap->link.eh_info;
char *when = "";
char *when = "idle";
/*
* We got a device interrupt from something that
* was supposed to be using EDMA or polling.
*/
ata_ehi_clear_desc(ehi);
if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
when = " while EDMA enabled";
if (!ap || (ap->flags & ATA_FLAG_DISABLED)) {
when = "disabled";
} else if (edma_was_enabled) {
when = "EDMA enabled";
} else {
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
when = " while polling";
when = "polling";
}
ata_ehi_push_desc(ehi, "unexpected device interrupt%s", when);
ata_ehi_push_desc(ehi, "unexpected device interrupt while %s", when);
ehi->err_mask |= AC_ERR_OTHER;
ehi->action |= ATA_EH_RESET;
ata_port_freeze(ap);
@ -1807,6 +1804,42 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp
port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
}
static void mv_port_intr(struct ata_port *ap, u32 port_cause)
{
struct mv_port_priv *pp;
int edma_was_enabled;
if (!ap || (ap->flags & ATA_FLAG_DISABLED)) {
mv_unexpected_intr(ap, 0);
return;
}
/*
* Grab a snapshot of the EDMA_EN flag setting,
* so that we have a consistent view for this port,
* even if something we call of our routines changes it.
*/
pp = ap->private_data;
edma_was_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
/*
* Process completed CRPB response(s) before other events.
*/
if (edma_was_enabled && (port_cause & DONE_IRQ)) {
mv_process_crpb_entries(ap, pp);
}
/*
* Handle chip-reported errors, or continue on to handle PIO.
*/
if (unlikely(port_cause & ERR_IRQ)) {
mv_err_intr(ap);
} else if (!edma_was_enabled) {
struct ata_queued_cmd *qc = mv_get_active_qc(ap);
if (qc)
ata_sff_host_intr(ap, qc);
else
mv_unexpected_intr(ap, edma_was_enabled);
}
}
/**
* mv_host_intr - Handle all interrupts on the given host controller
* @host: host specific structure
@ -1823,7 +1856,6 @@ static int mv_host_intr(struct ata_host *host, u32 main_irq_cause)
for (port = 0; port < hpriv->n_ports; port++) {
struct ata_port *ap = host->ports[port];
struct mv_port_priv *pp;
unsigned int p, shift, hardport, port_cause;
MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
@ -1865,32 +1897,12 @@ static int mv_host_intr(struct ata_host *host, u32 main_irq_cause)
writelfl(~ack_irqs, hc_mmio + HC_IRQ_CAUSE_OFS);
handled = 1;
}
/*
* Handle interrupts signalled for this port:
*/
port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);
if (!port_cause)
continue;
/*
* Process completed CRPB response(s) before other events.
*/
pp = ap->private_data;
if (port_cause & DONE_IRQ) {
if (pp->pp_flags & MV_PP_FLAG_EDMA_EN)
mv_process_crpb_entries(ap, pp);
}
/*
* Handle chip-reported errors, or continue on to handle PIO.
*/
if (unlikely(port_cause & ERR_IRQ)) {
mv_err_intr(ap);
} else {
if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
struct ata_queued_cmd *qc = mv_get_active_qc(ap);
if (qc) {
ata_sff_host_intr(ap, qc);
continue;
}
mv_unexpected_intr(ap);
}
}
if (port_cause)
mv_port_intr(ap, port_cause);
}
return handled;
}