scsi: megaraid_sas: Use synchronize_irq to wait for IRQs to complete

FIX - Do not use random delay to synchronize with IRQ. Use kernel API.

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index bafaf03..d8bfb87 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -3145,6 +3145,22 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
 }
 
 /**
+ * megasas_sync_irqs - Synchronizes all IRQs owned by adapter
+ * @instance:                  Adapter soft state
+ */
+void megasas_sync_irqs(unsigned long instance_addr)
+{
+       u32 count, i;
+       struct megasas_instance *instance =
+               (struct megasas_instance *)instance_addr;
+
+       count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
+
+       for (i = 0; i < count; i++)
+               synchronize_irq(pci_irq_vector(instance->pdev, i));
+}
+
+/**
  * megasas_complete_cmd_dpc_fusion -   Completes command
  * @instance:                  Adapter soft state
  *
@@ -3820,7 +3836,7 @@ megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
                        break;
                else {
                        instance->instancet->disable_intr(instance);
-                       msleep(1000);
+                       megasas_sync_irqs((unsigned long)instance);
                        megasas_complete_cmd_dpc_fusion
                                        ((unsigned long)instance);
                        instance->instancet->enable_intr(instance);
@@ -4174,7 +4190,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
        set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
        atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING);
        instance->instancet->disable_intr(instance);
-       msleep(1000);
+       megasas_sync_irqs((unsigned long)instance);
 
        /* First try waiting for commands to complete */
        if (megasas_wait_for_outstanding_fusion(instance, reason,