From: Christian Gromm <christian.gromm@microchip.com>
Date: Tue, 22 Dec 2015 09:52:48 +0000 (+0100)
Subject: staging: most: fix tracking of MBO offset
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9e2f2c4fb93a12e20f6bd82e1b9bf3df36236198;p=deliverable%2Flinux.git

staging: most: fix tracking of MBO offset

This patch increments mbo_offs by the number of bytes that have
been copied and resets it in case a complete mbo has been transferred
to user buffer.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/most/aim-cdev/cdev.c b/drivers/staging/most/aim-cdev/cdev.c
index 86194ce51472..0141293b4bf5 100644
--- a/drivers/staging/most/aim-cdev/cdev.c
+++ b/drivers/staging/most/aim-cdev/cdev.c
@@ -257,9 +257,8 @@ start_copy:
 
 	copied = to_copy - not_copied;
 
-	if (count < mbo->processed_length) {
-		channel->mbo_offs = copied;
-	} else {
+	channel->mbo_offs += copied;
+	if (channel->mbo_offs >= mbo->processed_length) {
 		most_put_mbo(mbo);
 		channel->mbo_offs = 0;
 		channel->stacked_mbo = NULL;