1 files changed, 37 insertions, 73 deletions

diff --git a/drivers/staging/gasket/gasket_interrupt.c b/drivers/staging/gasket/gasket_interrupt.c
index 1cfbc120f228..49d47afad64f 100644
--- a/drivers/staging/gasket/gasket_interrupt.c
+++ b/drivers/staging/gasket/gasket_interrupt.c
@@ -45,9 +45,6 @@ struct gasket_interrupt_data {
 	/* The width of a single interrupt in a packed interrupt register. */
 	int pack_width;
 
-	/* offset of wire interrupt registers */
-	const struct gasket_wire_interrupt_offsets *wire_interrupt_offsets;
-
 	/*
 	 * Design-wise, these elements should be bundled together, but
 	 * pci_enable_msix's interface requires that they be managed
@@ -92,19 +89,6 @@ static void gasket_interrupt_setup(struct gasket_dev *gasket_dev)
 
 	dev_dbg(gasket_dev->dev, "Running interrupt setup\n");
 
-	if (interrupt_data->type == PLATFORM_WIRE ||
-	    interrupt_data->type == PCI_MSI) {
-		/* Nothing needs to be done for platform or PCI devices. */
-		return;
-	}
-
-	if (interrupt_data->type != PCI_MSIX) {
-		dev_dbg(gasket_dev->dev,
-			"Cannot handle unsupported interrupt type %d\n",
-			interrupt_data->type);
-		return;
-	}
-
 	/* Setup the MSIX table. */
 
 	for (i = 0; i < interrupt_data->num_interrupts; i++) {
@@ -157,9 +141,22 @@ static void gasket_interrupt_setup(struct gasket_dev *gasket_dev)
 	}
 }
 
-static irqreturn_t gasket_msix_interrupt_handler(int irq, void *dev_id)
+static void
+gasket_handle_interrupt(struct gasket_interrupt_data *interrupt_data,
+			int interrupt_index)
 {
 	struct eventfd_ctx *ctx;
+
+	trace_gasket_interrupt_event(interrupt_data->name, interrupt_index);
+	ctx = interrupt_data->eventfd_ctxs[interrupt_index];
+	if (ctx)
+		eventfd_signal(ctx, 1);
+
+	++(interrupt_data->interrupt_counts[interrupt_index]);
+}
+
+static irqreturn_t gasket_msix_interrupt_handler(int irq, void *dev_id)
+{
 	struct gasket_interrupt_data *interrupt_data = dev_id;
 	int interrupt = -1;
 	int i;
@@ -175,14 +172,7 @@ static irqreturn_t gasket_msix_interrupt_handler(int irq, void *dev_id)
 		pr_err("Received unknown irq %d\n", irq);
 		return IRQ_HANDLED;
 	}
-	trace_gasket_interrupt_event(interrupt_data->name, interrupt);
-
-	ctx = interrupt_data->eventfd_ctxs[interrupt];
-	if (ctx)
-		eventfd_signal(ctx, 1);
-
-	++(interrupt_data->interrupt_counts[interrupt]);
-
+	gasket_handle_interrupt(interrupt_data, interrupt);
 	return IRQ_HANDLED;
 }
 
@@ -192,6 +182,12 @@ gasket_interrupt_msix_init(struct gasket_interrupt_data *interrupt_data)
 	int ret = 1;
 	int i;
 
+	interrupt_data->msix_entries =
+		kcalloc(interrupt_data->num_interrupts,
+			sizeof(struct msix_entry), GFP_KERNEL);
+	if (!interrupt_data->msix_entries)
+		return -ENOMEM;
+
 	for (i = 0; i < interrupt_data->num_interrupts; i++) {
 		interrupt_data->msix_entries[i].entry = i;
 		interrupt_data->msix_entries[i].vector = 0;
@@ -319,54 +315,40 @@ static struct gasket_sysfs_attribute interrupt_sysfs_attrs[] = {
 	GASKET_END_OF_ATTR_ARRAY,
 };
 
-int gasket_interrupt_init(struct gasket_dev *gasket_dev, const char *name,
-			  int type,
-			  const struct gasket_interrupt_desc *interrupts,
-			  int num_interrupts, int pack_width, int bar_index,
-			  const struct gasket_wire_interrupt_offsets *wire_int_offsets)
+int gasket_interrupt_init(struct gasket_dev *gasket_dev)
 {
 	int ret;
 	struct gasket_interrupt_data *interrupt_data;
+	const struct gasket_driver_desc *driver_desc =
+		gasket_get_driver_desc(gasket_dev);
 
 	interrupt_data = kzalloc(sizeof(struct gasket_interrupt_data),
 				 GFP_KERNEL);
 	if (!interrupt_data)
 		return -ENOMEM;
 	gasket_dev->interrupt_data = interrupt_data;
-	interrupt_data->name = name;
-	interrupt_data->type = type;
+	interrupt_data->name = driver_desc->name;
+	interrupt_data->type = driver_desc->interrupt_type;
 	interrupt_data->pci_dev = gasket_dev->pci_dev;
-	interrupt_data->num_interrupts = num_interrupts;
-	interrupt_data->interrupts = interrupts;
-	interrupt_data->interrupt_bar_index = bar_index;
-	interrupt_data->pack_width = pack_width;
+	interrupt_data->num_interrupts = driver_desc->num_interrupts;
+	interrupt_data->interrupts = driver_desc->interrupts;
+	interrupt_data->interrupt_bar_index = driver_desc->interrupt_bar_index;
+	interrupt_data->pack_width = driver_desc->interrupt_pack_width;
 	interrupt_data->num_configured = 0;
-	interrupt_data->wire_interrupt_offsets = wire_int_offsets;
 
-	/* Allocate all dynamic structures. */
-	interrupt_data->msix_entries = kcalloc(num_interrupts,
-					       sizeof(struct msix_entry),
-					       GFP_KERNEL);
-	if (!interrupt_data->msix_entries) {
-		kfree(interrupt_data);
-		return -ENOMEM;
-	}
-
-	interrupt_data->eventfd_ctxs = kcalloc(num_interrupts,
+	interrupt_data->eventfd_ctxs = kcalloc(driver_desc->num_interrupts,
 					       sizeof(struct eventfd_ctx *),
 					       GFP_KERNEL);
 	if (!interrupt_data->eventfd_ctxs) {
-		kfree(interrupt_data->msix_entries);
 		kfree(interrupt_data);
 		return -ENOMEM;
 	}
 
-	interrupt_data->interrupt_counts = kcalloc(num_interrupts,
+	interrupt_data->interrupt_counts = kcalloc(driver_desc->num_interrupts,
 						   sizeof(ulong),
 						   GFP_KERNEL);
 	if (!interrupt_data->interrupt_counts) {
 		kfree(interrupt_data->eventfd_ctxs);
-		kfree(interrupt_data->msix_entries);
 		kfree(interrupt_data);
 		return -ENOMEM;
 	}
@@ -379,12 +361,7 @@ int gasket_interrupt_init(struct gasket_dev *gasket_dev, const char *name,
 		force_msix_interrupt_unmasking(gasket_dev);
 		break;
 
-	case PCI_MSI:
-	case PLATFORM_WIRE:
 	default:
-		dev_err(gasket_dev->dev,
-			"Cannot handle unsupported interrupt type %d\n",
-			interrupt_data->type);
 		ret = -EINVAL;
 	}
 
@@ -417,6 +394,7 @@ gasket_interrupt_msix_cleanup(struct gasket_interrupt_data *interrupt_data)
 	if (interrupt_data->msix_configured)
 		pci_disable_msix(interrupt_data->pci_dev);
 	interrupt_data->msix_configured = 0;
+	kfree(interrupt_data->msix_entries);
 }
 
 int gasket_interrupt_reinit(struct gasket_dev *gasket_dev)
@@ -438,20 +416,16 @@ int gasket_interrupt_reinit(struct gasket_dev *gasket_dev)
 		force_msix_interrupt_unmasking(gasket_dev);
 		break;
 
-	case PCI_MSI:
-	case PLATFORM_WIRE:
 	default:
-		dev_dbg(gasket_dev->dev,
-			"Cannot handle unsupported interrupt type %d\n",
-			gasket_dev->interrupt_data->type);
 		ret = -EINVAL;
 	}
 
 	if (ret) {
-		/* Failing to setup MSIx will cause the device
+		/* Failing to setup interrupts will cause the device
 		 * to report GASKET_STATUS_LAMED, but is not fatal.
 		 */
-		dev_warn(gasket_dev->dev, "Couldn't init msix: %d\n", ret);
+		dev_warn(gasket_dev->dev, "Couldn't reinit interrupts: %d\n",
+			 ret);
 		return 0;
 	}
 
@@ -487,17 +461,12 @@ void gasket_interrupt_cleanup(struct gasket_dev *gasket_dev)
 		gasket_interrupt_msix_cleanup(interrupt_data);
 		break;
 
-	case PCI_MSI:
-	case PLATFORM_WIRE:
 	default:
-		dev_dbg(gasket_dev->dev,
-			"Cannot handle unsupported interrupt type %d\n",
-			interrupt_data->type);
+		break;
 	}
 
 	kfree(interrupt_data->interrupt_counts);
 	kfree(interrupt_data->eventfd_ctxs);
-	kfree(interrupt_data->msix_entries);
 	kfree(interrupt_data);
 	gasket_dev->interrupt_data = NULL;
 }
@@ -509,11 +478,6 @@ int gasket_interrupt_system_status(struct gasket_dev *gasket_dev)
 		return GASKET_STATUS_DEAD;
 	}
 
-	if (!gasket_dev->interrupt_data->msix_configured) {
-		dev_dbg(gasket_dev->dev, "Interrupt not initialized\n");
-		return GASKET_STATUS_LAMED;
-	}
-
 	if (gasket_dev->interrupt_data->num_configured !=
 		gasket_dev->interrupt_data->num_interrupts) {
 		dev_dbg(gasket_dev->dev,