[PATCH net-next 6/7] ibmvnic: Do not disable IRQ after scheduling tasklet

[Nathan Fontenot]

From: Brian King <brk...@linux.vnet.ibm.com>

Since the primary CRQ is only used for service functions and
not in the performance path, simplify the code a bit and avoid
disabling the IRQ.

Signed-off-by: Brian King <brk...@linux.vnet.ibm.com>
Signed-off-by: Nathan Fontenot <nf...@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c |   25 ++++++-------------------
 1 file changed, 6 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c 
b/drivers/net/ethernet/ibm/ibmvnic.c
index 4e27518..5de8bae 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -3031,12 +3031,8 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
 {
        struct ibmvnic_adapter *adapter = instance;
-       unsigned long flags;
 
-       spin_lock_irqsave(&adapter->crq.lock, flags);
-       vio_disable_interrupts(adapter->vdev);
        tasklet_schedule(&adapter->tasklet);
-       spin_unlock_irqrestore(&adapter->crq.lock, flags);
        return IRQ_HANDLED;
 }
 
@@ -3044,32 +3040,23 @@ static void ibmvnic_tasklet(void *data)
 {
        struct ibmvnic_adapter *adapter = data;
        struct ibmvnic_crq_queue *queue = &adapter->crq;
-       struct vio_dev *vdev = adapter->vdev;
        union ibmvnic_crq *crq;
        unsigned long flags;
        bool done = false;
 
        spin_lock_irqsave(&queue->lock, flags);
-       vio_disable_interrupts(vdev);
        while (!done) {
                /* Pull all the valid messages off the CRQ */
                while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
                        ibmvnic_handle_crq(crq, adapter);
                        crq->generic.first = 0;
                }
-               vio_enable_interrupts(vdev);
-               crq = ibmvnic_next_crq(adapter);
-               if (crq) {
-                       vio_disable_interrupts(vdev);
-                       ibmvnic_handle_crq(crq, adapter);
-                       crq->generic.first = 0;
-               } else {
-                       /* remain in tasklet until all
-                        * capabilities responses are received
-                        */
-                       if (!adapter->wait_capability)
-                               done = true;
-               }
+               
+               /* remain in tasklet until all
+                * capabilities responses are received
+                */
+               if (!adapter->wait_capability)
+                       done = true;
        }
        /* if capabilities CRQ's were sent in this tasklet, the following
         * tasklet must wait until all responses are received