[PATCH V2 02/36] smartpqi: cleanup interrupt management

[Don Brace]

From: Kevin Barnett <kevin.barn...@microsemi.com>

minor cleanup of interrupt initialization and tear-down.

Reviewed-by: Scott Benesh <scott.ben...@microsemi.com>
Reviewed-by: Scott Teel <scott.t...@microsemi.com>
Signed-off-by: Kevin Barnett <kevin.barn...@microsemi.com>
Signed-off-by: Don Brace <don.br...@microsemi.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c |   43 ++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c 
b/drivers/scsi/smartpqi/smartpqi_init.c
index dd00c69..b5a3505 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -2913,23 +2913,44 @@ static int pqi_request_irqs(struct pqi_ctrl_info 
*ctrl_info)
        return 0;
 }
 
+static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
+{
+       int i;
+
+       for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
+               free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
+                       &ctrl_info->queue_groups[i]);
+
+       ctrl_info->num_msix_vectors_initialized = 0;
+}
+
 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
 {
-       int ret;
+       int num_vectors_enabled;
 
-       ret = pci_alloc_irq_vectors(ctrl_info->pci_dev,
+       num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
                        PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
                        PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
-       if (ret < 0) {
+       if (num_vectors_enabled < 0) {
                dev_err(&ctrl_info->pci_dev->dev,
-                       "MSI-X init failed with error %d\n", ret);
-               return ret;
+                       "MSI-X init failed with error %d\n",
+                       num_vectors_enabled);
+               return num_vectors_enabled;
        }
 
-       ctrl_info->num_msix_vectors_enabled = ret;
+       ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
+
        return 0;
 }
 
+static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+       if (ctrl_info->num_msix_vectors_enabled) {
+               pci_free_irq_vectors(ctrl_info->pci_dev);
+               ctrl_info->num_msix_vectors_enabled = 0;
+       }
+}
+
 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
 {
        unsigned int i;
@@ -5519,14 +5540,8 @@ static inline void pqi_free_ctrl_info(struct 
pqi_ctrl_info *ctrl_info)
 
 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
 {
-       int i;
-
-       for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) {
-               free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
-                               &ctrl_info->queue_groups[i]);
-       }
-
-       pci_free_irq_vectors(ctrl_info->pci_dev);
+       pqi_free_irqs(ctrl_info);
+       pqi_disable_msix_interrupts(ctrl_info);
 }
 
 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)