3 files changed, 31 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c
index da4a2cfb61b4..e397ec0d388f 100644
--- a/drivers/infiniband/hw/ipath/ipath_driver.c
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c
@@ -104,6 +104,9 @@ static int __devinit ipath_init_one(struct pci_dev *,
 #define PCI_DEVICE_ID_INFINIPATH_HT 0xd
 #define PCI_DEVICE_ID_INFINIPATH_PE800 0x10
 
+/* Number of seconds before our card status check...  */
+#define STATUS_TIMEOUT 60
+
 static const struct pci_device_id ipath_pci_tbl[] = {
         { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_HT) },
         { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_PE800) },
@@ -119,6 +122,18 @@ static struct pci_driver ipath_driver = {
         .id_table = ipath_pci_tbl,
 };
 
+static void ipath_check_status(struct work_struct *work)
+{
+        struct ipath_devdata *dd = container_of(work, struct ipath_devdata,
+                                                status_work.work);
+
+        /*
+         * If we don't have any interrupts, let the user know and
+         * don't bother checking again.
+         */
+        if (dd->ipath_int_counter == 0)
+                dev_err(&dd->pcidev->dev, "No interrupts detected.\n");
+}
 
 static inline void read_bars(struct ipath_devdata *dd, struct pci_dev *dev,
                              u32 *bar0, u32 *bar1)
@@ -187,6 +202,8 @@ static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev)
         dd->pcidev = pdev;
         pci_set_drvdata(pdev, dd);
 
+        INIT_DELAYED_WORK(&dd->status_work, ipath_check_status);
+
         list_add(&dd->ipath_list, &ipath_dev_list);
 
 bail_unlock:
@@ -511,6 +528,9 @@ static int __devinit ipath_init_one(struct pci_dev *pdev,
         ipath_diag_add(dd);
         ipath_register_ib_device(dd);
 
+        /* Check that card status in STATUS_TIMEOUT seconds. */
+        schedule_delayed_work(&dd->status_work, HZ * STATUS_TIMEOUT);
+
         goto bail;
 
 bail_irqsetup:
@@ -638,6 +658,9 @@ static void __devexit ipath_remove_one(struct pci_dev *pdev)
          */
         ipath_shutdown_device(dd);
 
+        cancel_delayed_work(&dd->status_work);
+        flush_scheduled_work();
+
         if (dd->verbs_dev)
                 ipath_unregister_ib_device(dd->verbs_dev);
 
diff --git a/drivers/infiniband/hw/ipath/ipath_intr.c b/drivers/infiniband/hw/ipath/ipath_intr.c
index ce490235c24f..47aa43428fbf 100644
--- a/drivers/infiniband/hw/ipath/ipath_intr.c
+++ b/drivers/infiniband/hw/ipath/ipath_intr.c
@@ -1009,6 +1009,9 @@ irqreturn_t ipath_intr(int irq, void *data)
 
         ipath_stats.sps_ints++;
 
+        if (dd->ipath_int_counter != (u32) -1)
+                dd->ipath_int_counter++;
+
         if (!(dd->ipath_flags & IPATH_PRESENT)) {
                 /*
                  * This return value is not great, but we do not want the
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index a27e06297636..3105005fc9d2 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -297,6 +297,8 @@ struct ipath_devdata {
         u32 ipath_lastport_piobuf;
         /* is a stats timer active */
         u32 ipath_stats_timer_active;
+        /* number of interrupts for this device -- saturates... */
+        u32 ipath_int_counter;
         /* dwords sent read from counter */
         u32 ipath_lastsword;
         /* dwords received read from counter */
@@ -571,6 +573,9 @@ struct ipath_devdata {
         u32 ipath_overrun_thresh_errs;
         u32 ipath_lli_errs;
 
+        /* status check work */
+        struct delayed_work status_work;
+
         /*
          * Not all devices managed by a driver instance are the same
          * type, so these fields must be per-device.