IB/mthca: Distinguish multiple devices in /proc/interrupts

When the mthca driver uses the same name for interrupts for every
device in the system.  This can make it very confusing trying to work
out exactly which device MSI-X interrupts are for.  Change the driver
to add the PCI name of the device to the interrupt name.

Signed-off-by: Arputham Benjamin <abenjamin@sgi.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/mthca/mthca_eq.c

@@ -829,27 +829,34 @@ int mthca_init_eq_table(struct mthca_dev *dev)
 
 	if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
 		static const char *eq_name[] = {
-			[MTHCA_EQ_COMP]  = DRV_NAME " (comp)",
-			[MTHCA_EQ_ASYNC] = DRV_NAME " (async)",
-			[MTHCA_EQ_CMD]   = DRV_NAME " (cmd)"
+			[MTHCA_EQ_COMP]  = DRV_NAME "-comp",
+			[MTHCA_EQ_ASYNC] = DRV_NAME "-async",
+			[MTHCA_EQ_CMD]   = DRV_NAME "-cmd"
 		};
 
 		for (i = 0; i < MTHCA_NUM_EQ; ++i) {
+			snprintf(dev->eq_table.eq[i].irq_name,
+				 IB_DEVICE_NAME_MAX,
+				 "%s@pci:%s", eq_name[i],
+				 pci_name(dev->pdev));
 			err = request_irq(dev->eq_table.eq[i].msi_x_vector,
 					  mthca_is_memfree(dev) ?
 					  mthca_arbel_msi_x_interrupt :
 					  mthca_tavor_msi_x_interrupt,
-					  0, eq_name[i], dev->eq_table.eq + i);
+					  0, dev->eq_table.eq[i].irq_name,
+					  dev->eq_table.eq + i);
 			if (err)
 				goto err_out_cmd;
 			dev->eq_table.eq[i].have_irq = 1;
 		}
 	} else {
+		snprintf(dev->eq_table.eq[0].irq_name, IB_DEVICE_NAME_MAX,
+			 DRV_NAME "@pci:%s", pci_name(dev->pdev));
 		err = request_irq(dev->pdev->irq,
 				  mthca_is_memfree(dev) ?
 				  mthca_arbel_interrupt :
 				  mthca_tavor_interrupt,
-				  IRQF_SHARED, DRV_NAME, dev);
+				  IRQF_SHARED, dev->eq_table.eq[0].irq_name, dev);
 		if (err)
 			goto err_out_cmd;
 		dev->eq_table.have_irq = 1;

drivers/infiniband/hw/mthca/mthca_provider.h

@@ -113,6 +113,7 @@ struct mthca_eq {
 	int                    nent;
 	struct mthca_buf_list *page_list;
 	struct mthca_mr        mr;
+	char		       irq_name[IB_DEVICE_NAME_MAX];
 };
 
 struct mthca_av;