From: M. Mohan Kumar <mohan@in.ibm.com>
Date: Wed, 16 Mar 2011 16:10:49 +0000 (+0530)
Subject: 9p: use the updated offset given by generic_write_checks
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=aaf0ef1d2bce05cfd06cf29c96a6973df4d0a6a8;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

9p: use the updated offset given by generic_write_checks

Without this fix, even if a file is opened in O_APPEND mode, data will be
written at current file position instead of end of file.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
---

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 6997eb62fbba..ffed55817f0c 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -508,9 +508,12 @@ v9fs_file_write(struct file *filp, const char __user * data,
 	if (!count)
 		goto out;
 
-	return v9fs_file_write_internal(filp->f_path.dentry->d_inode,
+	retval = v9fs_file_write_internal(filp->f_path.dentry->d_inode,
 					filp->private_data,
-					data, count, offset, 1);
+					data, count, &origin, 1);
+	/* update offset on successful write */
+	if (retval > 0)
+		*offset = origin;
 out:
 	return retval;
 }