scsi: megaraid_sas: Add helper functions for irq_context

Adding helper functions for ISR access and release to improve readability.

Link: https://lore.kernel.org/r/20210929124022.24605-3-sumit.saxena@broadcom.comSigned-off-by: NSumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_fusion.c

@@ -3497,6 +3497,41 @@ megasas_complete_r1_command(struct megasas_instance *instance,
 	}
 }
 
+/**
+ * access_irq_context:		Access to reply processing
+ * @irq_context:		IRQ context
+ *
+ * Synchronize access to reply processing.
+ *
+ * Return:  true on success, false on failure.
+ */
+static inline
+bool access_irq_context(struct megasas_irq_context  *irq_context)
+{
+	if (!irq_context)
+		return true;
+
+	if (atomic_add_unless(&irq_context->in_used, 1, 1))
+		return true;
+
+	return false;
+}
+
+/**
+ * release_irq_context:		Release reply processing
+ * @irq_context:		IRQ context
+ *
+ * Release access of reply processing.
+ *
+ * Return: Nothing.
+ */
+static inline
+void release_irq_context(struct megasas_irq_context  *irq_context)
+{
+	if (irq_context)
+		atomic_dec(&irq_context->in_used);
+}
+
 /**
  * complete_cmd_fusion -	Completes command
  * @instance:			Adapter soft state
@@ -3530,7 +3565,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
 	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
 		return IRQ_HANDLED;
 
-	if (irq_context && !atomic_add_unless(&irq_context->in_used, 1, 1))
+	if (!access_irq_context(irq_context))
 		return 0;
 
 	desc = fusion->reply_frames_desc[MSIxIndex] +
@@ -3544,8 +3579,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
 		MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 
 	if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) {
-		if (irq_context)
-			atomic_dec(&irq_context->in_used);
+		release_irq_context(irq_context);
 		return IRQ_NONE;
 	}
 
@@ -3663,7 +3697,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
 					irq_context->irq_line_enable = true;
 					irq_poll_sched(&irq_context->irqpoll);
 				}
-				atomic_dec(&irq_context->in_used);
+				release_irq_context(irq_context);
 				return num_completed;
 			}
 		}
@@ -3682,8 +3716,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
 		megasas_check_and_restore_queue_depth(instance);
 	}
 
-	if (irq_context)
-		atomic_dec(&irq_context->in_used);
+	release_irq_context(irq_context);
 
 	return num_completed;
 }