From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Mon, 28 Feb 2011 11:34:11 +0000 (+0530)
Subject: fs/9p: Writeback dirty data before setattr
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3dc5436aa5719be029bbc2bef0e5cb0312e4ff88;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

fs/9p: Writeback dirty data before setattr

change file attribute can result in making the file readonly.
So flush the dirty pages before that.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
---

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 2555776920a..8a2c232f708 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -999,6 +999,10 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 		if (retval)
 			return retval;
 	}
+	/* Write all dirty data */
+	if (S_ISREG(dentry->d_inode->i_mode))
+		filemap_write_and_wait(dentry->d_inode->i_mapping);
+
 	retval = p9_client_wstat(fid, &wstat);
 	if (retval < 0)
 		return retval;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index bcd0ee2e549..67c138e94fe 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -459,6 +459,10 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
 		if (retval)
 			return retval;
 	}
+	/* Write all dirty data */
+	if (S_ISREG(dentry->d_inode->i_mode))
+		filemap_write_and_wait(dentry->d_inode->i_mapping);
+
 	retval = p9_client_setattr(fid, &p9attr);
 	if (retval < 0)
 		return retval;