[PATCH 3.16 004/132] media: cx18: update *pos correctly in cx18_read_pos()

[Ben Hutchings]

3.16.74-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpen...@oracle.com>

commit 7afb0df554292dca7568446f619965fb8153085d upstream.

We should be updating *pos.  The current code is a no-op.

Fixes: 1c1e45d17b66 ("V4L/DVB (7786): cx18: new driver for the Conexant CX23418 
MPEG encoder chip")

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 drivers/media/pci/cx18/cx18-fileops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/pci/cx18/cx18-fileops.c
+++ b/drivers/media/pci/cx18/cx18-fileops.c
@@ -489,7 +489,7 @@ static ssize_t cx18_read_pos(struct cx18
 
        CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc);
        if (rc > 0)
-               pos += rc;
+               *pos += rc;
        return rc;
 }