netdev - [PATCH] packet: Don't check frames_per

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Message-Id: <1447753116-11831-1-git-send-email-tklauser@distanz.ch>
Date:	Tue, 17 Nov 2015 10:38:36 +0100
From:	Tobias Klauser <tklauser@...tanz.ch>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: [PATCH] packet: Don't check frames_per_block against negative values

rb->frames_per_block is an unsigned int, thus can never be negative.

Also fix spacing in the calculation of frames_per_block.

Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
---
 net/packet/af_packet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index af399ca..4c27ae76 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -4119,8 +4119,8 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
 		if (unlikely(req->tp_frame_size & (TPACKET_ALIGNMENT - 1)))
 			goto out;
 
-		rb->frames_per_block = req->tp_block_size/req->tp_frame_size;
-		if (unlikely(rb->frames_per_block <= 0))
+		rb->frames_per_block = req->tp_block_size / req->tp_frame_size;
+		if (unlikely(rb->frames_per_block == 0))
 			goto out;
 		if (unlikely((rb->frames_per_block * req->tp_block_nr) !=
 					req->tp_frame_nr))
-- 
2.6.3.368.gf34be46.dirty


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