- For SAS but neither FC nor SPI controllers default to using MSI (still

  allowing their use to be disabled via device hints though). This matches
  what the corresponding Linux driver provided by LSI does. Tested with
  SAS1064.
- There's no need to keep track of the RIDs used.
- Don't allocate MSI/MSI-X as RF_SHAREABLE.
- Remove a comment which no longer applies since r209599.
- Assign NULL rather than 0 to pointers.

MFC after:	1 month

2 files changed, 20 insertions, 22 deletions

diff --git a/sys/dev/mpt/mpt.h b/sys/dev/mpt/mpt.h
index 47af5ba6e50e..d12c307c8031 100644
--- a/sys/dev/mpt/mpt.h
+++ b/sys/dev/mpt/mpt.h
@@ -721,11 +721,9 @@ struct mpt_softc {
 	 * DMA Mapping Stuff
 	 */
 	struct resource *	pci_reg;	/* Register map for chip */
-	int			pci_mem_rid;	/* Resource ID */
 	bus_space_tag_t		pci_st;		/* Bus tag for registers */
 	bus_space_handle_t	pci_sh;		/* Bus handle for registers */
 	/* PIO versions of above. */
-	int			pci_pio_rid;
 	struct resource *	pci_pio_reg;
 	bus_space_tag_t		pci_pio_st;
 	bus_space_handle_t	pci_pio_sh;
diff --git a/sys/dev/mpt/mpt_pci.c b/sys/dev/mpt/mpt_pci.c
index 98604d0de5bd..f7201b613e6a 100644
--- a/sys/dev/mpt/mpt_pci.c
+++ b/sys/dev/mpt/mpt_pci.c
@@ -362,9 +362,11 @@ mpt_set_options(struct mpt_softc *mpt)
 	}
 	tval = 0;
 	mpt->msi_enable = 0;
-	if (resource_int_value(device_get_name(mpt->dev),
-	    device_get_unit(mpt->dev), "msi_enable", &tval) == 0 && tval == 1) {
+	if (mpt->is_sas)
 		mpt->msi_enable = 1;
+	if (resource_int_value(device_get_name(mpt->dev),
+	    device_get_unit(mpt->dev), "msi_enable", &tval) == 0) {
+		mpt->msi_enable = tval;
 	}
 }
 #endif
@@ -517,9 +519,9 @@ mpt_pci_attach(device_t dev)
 	 * certain reset operations (but must be disabled for
 	 * some cards otherwise).
 	 */
-	mpt->pci_pio_rid = PCIR_BAR(mpt_io_bar);
+	mpt_io_bar = PCIR_BAR(mpt_io_bar);
 	mpt->pci_pio_reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
-			    &mpt->pci_pio_rid, RF_ACTIVE);
+	    &mpt_io_bar, RF_ACTIVE);
 	if (mpt->pci_pio_reg == NULL) {
 		device_printf(dev, "unable to map registers in PIO mode\n");
 		goto bad;
@@ -528,9 +530,9 @@ mpt_pci_attach(device_t dev)
 	mpt->pci_pio_sh = rman_get_bushandle(mpt->pci_pio_reg);
 
 	/* Allocate kernel virtual memory for the 9x9's Mem0 region */
-	mpt->pci_mem_rid = PCIR_BAR(mpt_mem_bar);
+	mpt_mem_bar = PCIR_BAR(mpt_mem_bar);
 	mpt->pci_reg = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
-			&mpt->pci_mem_rid, RF_ACTIVE);
+	    &mpt_mem_bar, RF_ACTIVE);
 	if (mpt->pci_reg == NULL) {
 		device_printf(dev, "Unable to memory map registers.\n");
 		if (mpt->is_sas) {
@@ -570,7 +572,7 @@ mpt_pci_attach(device_t dev)
 		}
 	}
 	mpt->pci_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &iqd,
-	    RF_ACTIVE | RF_SHAREABLE);
+	    RF_ACTIVE | (mpt->pci_msi_count ? 0 : RF_SHAREABLE));
 	if (mpt->pci_irq == NULL) {
 		device_printf(dev, "could not allocate interrupt\n");
 		goto bad;
@@ -589,7 +591,6 @@ mpt_pci_attach(device_t dev)
 	}
 
 	/* Allocate dma memory */
-/* XXX JGibbs -Should really be done based on IOCFacts. */
 	if (mpt_dma_mem_alloc(mpt)) {
 		mpt_prt(mpt, "Could not allocate DMA memory\n");
 		goto bad;
@@ -655,13 +656,13 @@ mpt_free_bus_resources(struct mpt_softc *mpt)
 {
 	if (mpt->ih) {
 		bus_teardown_intr(mpt->dev, mpt->pci_irq, mpt->ih);
-		mpt->ih = 0;
+		mpt->ih = NULL;
 	}
 
 	if (mpt->pci_irq) {
 		bus_release_resource(mpt->dev, SYS_RES_IRQ,
-		    mpt->pci_msi_count ? 1 : 0, mpt->pci_irq);
-		mpt->pci_irq = 0;
+		    rman_get_rid(mpt->pci_irq), mpt->pci_irq);
+		mpt->pci_irq = NULL;
 	}
 
 	if (mpt->pci_msi_count) {
@@ -670,14 +671,14 @@ mpt_free_bus_resources(struct mpt_softc *mpt)
 	}
 		
 	if (mpt->pci_pio_reg) {
-		bus_release_resource(mpt->dev, SYS_RES_IOPORT, mpt->pci_pio_rid,
-			mpt->pci_pio_reg);
-		mpt->pci_pio_reg = 0;
+		bus_release_resource(mpt->dev, SYS_RES_IOPORT,
+		    rman_get_rid(mpt->pci_pio_reg), mpt->pci_pio_reg);
+		mpt->pci_pio_reg = NULL;
 	}
 	if (mpt->pci_reg) {
-		bus_release_resource(mpt->dev, SYS_RES_MEMORY, mpt->pci_mem_rid,
-			mpt->pci_reg);
-		mpt->pci_reg = 0;
+		bus_release_resource(mpt->dev, SYS_RES_MEMORY,
+		    rman_get_rid(mpt->pci_reg), mpt->pci_reg);
+		mpt->pci_reg = NULL;
 	}
 	MPT_LOCK_DESTROY(mpt);
 }
@@ -817,10 +818,9 @@ mpt_dma_mem_free(struct mpt_softc *mpt)
 	bus_dmamem_free(mpt->reply_dmat, mpt->reply, mpt->reply_dmap);
 	bus_dma_tag_destroy(mpt->reply_dmat);
 	bus_dma_tag_destroy(mpt->parent_dmat);
-	mpt->reply_dmat = 0;
+	mpt->reply_dmat = NULL;
 	free(mpt->request_pool, M_DEVBUF);
-	mpt->request_pool = 0;
-
+	mpt->request_pool = NULL;
 }
 
 /* Reads modifiable (via PCI transactions) config registers */