linux-kernel - [PATCH] fuse: Don't check for file->private_data on open(). It is set by the core.

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Date:	Wed, 12 Nov 2014 19:56:21 +0100
From:	Martin Kepplinger <martink@...teo.de>
To:	giedriuswork@...il.com
Cc:	miklos@...redi.hu, fuse-devel@...ts.sourceforge.net,
	thierry.reding@...il.com, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org, Martin Kepplinger <martink@...teo.de>
Subject: [PATCH] fuse: Don't check for file->private_data on open(). It is set by the core.

The miscdevice core now sets file->private_data to the struct miscdevice
so don't fail when this is not NULL.

Reported-by: Giedrius Statkevicius <giedriuswork@...il.com>
Signed-off-by: Martin Kepplinger <martink@...teo.de>
---
sorry, I can't read ;) Is this a fix for your problem (instead of the first
patch)?

in case of fuse_ctl_add_conn(fc) failing things should proceed as before.

 fs/fuse/inode.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 03246cd..a97a475 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1092,9 +1092,6 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	}
 
 	mutex_lock(&fuse_mutex);
-	err = -EINVAL;
-	if (file->private_data)
-		goto err_unlock;
 
 	err = fuse_ctl_add_conn(fc);
 	if (err)
@@ -1117,6 +1114,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	return 0;
 
  err_unlock:
+	file->private_data = NULL;
 	mutex_unlock(&fuse_mutex);
  err_free_init_req:
 	fuse_request_free(init_req);
-- 
1.7.10.4

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