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mei: don't update offset in write

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commit a103af1b64 upstream.

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>
This commit is contained in:
Alexander Usyskin 2018-07-09 12:21:44 +03:00 committed by Greg Kroah-Hartman
parent cf7ab2abc5
commit cfcfbe08d2
1 changed files with 0 additions and 1 deletions
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1
drivers/misc/mei/main.c
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@ -291,7 +291,6 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
goto out;
}
*offset = 0;
cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, file);
if (!cb) {
rets = -ENOMEM;