[SCSI] megaraid_mbox: use mutex instead of semaphore

The Megaraid Mailbox driver uses a semaphore as mutex.  Use the mutex API
instead of the (binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: "Patro, Sumant" <Sumant.Patro@lsi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index 7d5a4d651b0..c46685a03a9 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -3880,7 +3880,7 @@ megaraid_sysfs_alloc_resources(adapter_t *adapter)
                 megaraid_sysfs_free_resources(adapter);
         }
 
-        sema_init(&raid_dev->sysfs_sem, 1);
+        mutex_init(&raid_dev->sysfs_mtx);
 
         init_waitqueue_head(&raid_dev->sysfs_wait_q);
 
@@ -3981,7 +3981,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter)
         /*
          * Allow only one read at a time to go through the sysfs attributes
          */
-        down(&raid_dev->sysfs_sem);
+        mutex_lock(&raid_dev->sysfs_mtx);
 
         uioc    = raid_dev->sysfs_uioc;
         mbox64  = raid_dev->sysfs_mbox64;
@@ -4057,7 +4057,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter)
 
         del_timer_sync(timerp);
 
-        up(&raid_dev->sysfs_sem);
+        mutex_unlock(&raid_dev->sysfs_mtx);
 
         return rval;
 }