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Commit a9010329 authored by Mark Lord's avatar Mark Lord Committed by Jeff Garzik
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sata_mv new mv_port_intr function 



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: default avatarMark Lord <mlord@pobox.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent eabd5eb1

drivers/ata/sata_mv.c

+48 −36
Original line number Diff line number Diff line
@@ -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;

		}

		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.

		 * Handle interrupts signalled for this port:

		 */

		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);

			}

		}

		port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);

		if (port_cause)

			mv_port_intr(ap, port_cause);

	}

	return handled;

}