Subject: fix livelock introduced in previous patch

From: Arnd Bergmann <arnd.bergmann@de.ibm.com>
The patch labelled 'spufs: block in spu_acquire_runnable' introduced
a possible livelock by not releasing the context semaphore in the
error path of spufs_mfc_write, so fix that.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Index: linux-2.6/arch/powerpc/platforms/cell/spufs/file.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/file.c
+++ linux-2.6/arch/powerpc/platforms/cell/spufs/file.c
@@ -1499,7 +1499,7 @@ static ssize_t spufs_mfc_write(struct fi
 	spu_acquire(ctx);
 	ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
 	if (ret)
-		goto out;
+		goto out_unlock;
 
 	if (file->f_flags & O_NONBLOCK) {
 		ret = ctx->ops->send_mfc_command(ctx, &cmd);