Changeset c69646f8 in mainline for uspace/srv/vfs/vfs_ops.c

Timestamp:

2011-09-09T15:50:00Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5da7199

Parents:

7c014d1

Message:

Fix deadlock caused by a too early released exchange.

File:

• uspace/srv/vfs/vfs_ops.c (modified) (1 diff)

uspace/srv/vfs/vfs_ops.c

@@ -224 +224 @@
         }
         
+        /*
+         * Wait for the answer before releasing the exchange to avoid deadlock
+         * in case the answer depends on further calls to the same file system.
+         * Think of a case when mounting a FS on a file_bd backed by a file on
+         * the same FS. 
+         */
+        async_wait_for(msg, &rc);
         vfs_exchange_release(exch);
-        async_wait_for(msg, &rc);
         
         if (rc == EOK) {