[SCSI] megaraid_sas: Convert aen_mutex to the mutex API

Signed-off-by: NMatthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: NBo Yang <Bo.Yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/megaraid/megaraid_sas.c

@@ -31,6 +31,7 @@
 #include <linux/moduleparam.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
+#include <linux/mutex.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/uio.h>
@@ -2358,7 +2359,7 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	spin_lock_init(&instance->cmd_pool_lock);
 
-	sema_init(&instance->aen_mutex, 1);
+	mutex_init(&instance->aen_mutex);
 	sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
 
 	/*
@@ -2874,10 +2875,10 @@ static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
 	if (!instance)
 		return -ENODEV;
 
-	down(&instance->aen_mutex);
+	mutex_lock(&instance->aen_mutex);
 	error = megasas_register_aen(instance, aen.seq_num,
 				     aen.class_locale_word);
-	up(&instance->aen_mutex);
+	mutex_unlock(&instance->aen_mutex);
 	return error;
 }
 

drivers/scsi/megaraid/megaraid_sas.h

@@ -1089,7 +1089,7 @@ struct megasas_instance {
 	struct megasas_evt_detail *evt_detail;
 	dma_addr_t evt_detail_h;
 	struct megasas_cmd *aen_cmd;
-	struct semaphore aen_mutex;
+	struct mutex aen_mutex;
 	struct semaphore ioctl_sem;
 
 	struct Scsi_Host *host;