3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Paul Durrant <paul.durr...@citrix.com>
[ Upstream commit 0576eddf24df716d8570ef8ca11452a9f98eaab2 ]
This patch removes a test in start_new_rx_buffer() that checks whether
a copy operation is less than MAX_BUFFER_OFFSET in length, since
MAX_BUFFER_OFFSET is defined to be PAGE_SIZE and the only caller of
start_new_rx_buffer() already limits copy operations to PAGE_SIZE or less.
Signed-off-by: Paul Durrant <paul.durr...@citrix.com>
Cc: Ian Campbell <ian.campb...@citrix.com>
Cc: Wei Liu <wei.l...@citrix.com>
Cc: Sander Eikelenboom <li...@eikelenboom.it>
Reported-By: Sander Eikelenboom <li...@eikelenboom.it>
Tested-By: Sander Eikelenboom <li...@eikelenboom.it>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/net/xen-netback/netback.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -192,8 +192,8 @@ static bool start_new_rx_buffer(int offs
* into multiple copies tend to give large frags their
* own buffers as before.
*/
- if ((offset + size > MAX_BUFFER_OFFSET) &&
- (size <= MAX_BUFFER_OFFSET) && offset && !head)
+ BUG_ON(size > MAX_BUFFER_OFFSET);
+ if ((offset + size > MAX_BUFFER_OFFSET) && offset && !head)
return true;
return false;
--
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