From: Alexander Usyskin <alexander.usyskin@intel.com>
Date: Mon, 9 Jul 2018 09:21:44 +0000 (+0300)
Subject: mei: don't update offset in write
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a103af1b64d74853a5e08ca6c86aeb0e5c6ca4f1;p=linux.git

mei: don't update offset in write

MEI enables writes of complete messages only
while read can be performed in parts, hence
write should not update the file offset to
not break interleaving partial reads with writes.

Cc: <stable@vger.kernel.org>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index f690918f7817b..302ba7a63bd2d 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -312,7 +312,6 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
 		}
 	}
 
-	*offset = 0;
 	cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, file);
 	if (!cb) {
 		rets = -ENOMEM;