[PATCH] kfifo: kfifo_copy_{to,from}_user: Fix copied bytes calculation

[Lars-Peter Clausen]

'copied' and 'len' are in bytes, while 'ret' is in elements, so we need to
multiply 'ret' with the size of one element to get the correct result.

Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
 lib/kfifo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/kfifo.c b/lib/kfifo.c
index 7b7f830..d79b9d2 100644
--- a/lib/kfifo.c
+++ b/lib/kfifo.c
@@ -215,7 +215,7 @@ static unsigned long kfifo_copy_from_user(struct __kfifo *fifo,
 	 * incrementing the fifo->in index counter
 	 */
 	smp_wmb();
-	*copied = len - ret;
+	*copied = len - ret * esize;
 	/* return the number of elements which are not copied */
 	return ret;
 }
@@ -275,7 +275,7 @@ static unsigned long kfifo_copy_to_user(struct __kfifo *fifo, void __user *to,
 	 * incrementing the fifo->out index counter
 	 */
 	smp_wmb();
-	*copied = len - ret;
+	*copied = len - ret * esize;
 	/* return the number of elements which are not copied */
 	return ret;
 }
-- 
1.8.0

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