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Commit 10f66018 authored by Stephen M. Cameron's avatar Stephen M. Cameron Committed by James Bottomley
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[SCSI] hpsa: separate intx and msi/msix interrupt handlers 



There are things which need to be done in the intx
interrupt handler which do not need to be done in
the msi/msix interrupt handler, like checking that
the interrupt is actually for us, and checking that the
interrupt pending bit on the hardware is set (which we
weren't previously doing at all, which means old controllers
wouldn't work), so it makes sense to separate these into
two functions.

Signed-off-by: default avatarStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 18867659

drivers/scsi/hpsa.c

+32 −7
Original line number Diff line number Diff line
@@ -126,7 +126,8 @@ static struct board_type products[] = { 


static int number_of_controllers;



static irqreturn_t do_hpsa_intr(int irq, void *dev_id);

static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);

static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);

static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);

static void start_io(struct ctlr_info *h);
@@ -2858,9 +2859,8 @@ static inline bool interrupt_pending(struct ctlr_info *h) 


static inline long interrupt_not_for_us(struct ctlr_info *h)

{

	return !(h->msi_vector || h->msix_vector) &&

		((h->access.intr_pending(h) == 0) ||

		(h->interrupts_enabled == 0));

	return (h->access.intr_pending(h) == 0) ||

		(h->interrupts_enabled == 0);

}



static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
@@ -2934,7 +2934,7 @@ static inline u32 process_nonindexed_cmd(struct ctlr_info *h, 
	return next_command(h);

}



static irqreturn_t do_hpsa_intr(int irq, void *dev_id)

static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id)

{

	struct ctlr_info *h = dev_id;

	unsigned long flags;
@@ -2942,6 +2942,26 @@ static irqreturn_t do_hpsa_intr(int irq, void *dev_id) 


	if (interrupt_not_for_us(h))

		return IRQ_NONE;

	spin_lock_irqsave(&h->lock, flags);

	while (interrupt_pending(h)) {

		raw_tag = get_next_completion(h);

		while (raw_tag != FIFO_EMPTY) {

			if (hpsa_tag_contains_index(raw_tag))

				raw_tag = process_indexed_cmd(h, raw_tag);

			else

				raw_tag = process_nonindexed_cmd(h, raw_tag);

		}

	}

	spin_unlock_irqrestore(&h->lock, flags);

	return IRQ_HANDLED;

}



static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id)

{

	struct ctlr_info *h = dev_id;

	unsigned long flags;

	u32 raw_tag;



	spin_lock_irqsave(&h->lock, flags);

	raw_tag = get_next_completion(h);

	while (raw_tag != FIFO_EMPTY) {
@@ -3754,7 +3774,12 @@ static int __devinit hpsa_init_one(struct pci_dev *pdev, 


	/* make sure the board interrupts are off */

	h->access.set_intr_mask(h, HPSA_INTR_OFF);

	rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr,



	if (h->msix_vector || h->msi_vector)

		rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr_msi,

				IRQF_DISABLED, h->devname, h);

	else

		rc = request_irq(h->intr[PERF_MODE_INT], do_hpsa_intr_intx,

				IRQF_DISABLED, h->devname, h);

	if (rc) {

		dev_err(&pdev->dev, "unable to get irq %d for %s\n",