From: Paul Durrant Date: Fri, 28 Mar 2014 11:39:05 +0000 (+0000) Subject: xen-netback: remove pointless clause from if statement X-Git-Tag: v3.15-rc1~113^2~17^2~1^2~2 X-Git-Url: http://git.cascardo.info/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=0576eddf24df716d8570ef8ca11452a9f98eaab2 xen-netback: remove pointless clause from if statement 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 Cc: Ian Campbell Cc: Wei Liu Cc: Sander Eikelenboom Reported-By: Sander Eikelenboom Tested-By: Sander Eikelenboom Signed-off-by: David S. Miller --- diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 438d0c09b7e6..72314c7998fc 100644 --- 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 offset, unsigned long size, int head) * 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;