1 files changed, 7 insertions, 13 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_mcg.c b/drivers/infiniband/hw/mthca/mthca_mcg.c
index 77bc6c746f43..321f11e707f2 100644
--- a/drivers/infiniband/hw/mthca/mthca_mcg.c
+++ b/drivers/infiniband/hw/mthca/mthca_mcg.c
@@ -154,10 +154,7 @@ int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                 return PTR_ERR(mailbox);
         mgm = mailbox->buf;
 
-        if (down_interruptible(&dev->mcg_table.sem)) {
-                err = -EINTR;
-                goto err_sem;
-        }
+        mutex_lock(&dev->mcg_table.mutex);
 
         err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);
         if (err)
@@ -241,8 +238,8 @@ int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                 BUG_ON(index < dev->limits.num_mgms);
                 mthca_free(&dev->mcg_table.alloc, index);
         }
-        up(&dev->mcg_table.sem);
- err_sem:
+        mutex_unlock(&dev->mcg_table.mutex);
+
         mthca_free_mailbox(dev, mailbox);
         return err;
 }
@@ -263,10 +260,7 @@ int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                 return PTR_ERR(mailbox);
         mgm = mailbox->buf;
 
-        if (down_interruptible(&dev->mcg_table.sem)) {
-                err = -EINTR;
-                goto err_sem;
-        }
+        mutex_lock(&dev->mcg_table.mutex);
 
         err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);
         if (err)
@@ -371,8 +365,8 @@ int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
         }
 
  out:
-        up(&dev->mcg_table.sem);
- err_sem:
+        mutex_unlock(&dev->mcg_table.mutex);
+
         mthca_free_mailbox(dev, mailbox);
         return err;
 }
@@ -389,7 +383,7 @@ int __devinit mthca_init_mcg_table(struct mthca_dev *dev)
         if (err)
                 return err;
 
-        init_MUTEX(&dev->mcg_table.sem);
+        mutex_init(&dev->mcg_table.mutex);
 
         return 0;
 }