From b3c3e7d7d9795df16012d5c60e5f789e7fade311 Mon Sep 17 00:00:00 2001
From: Francois Romieu <romieu@fr.zoreil.com>
Date: Mon, 27 Feb 2006 23:11:08 +0100
Subject: [PATCH] via-velocity: fix memory corruption when changing the mtu
velocity_rx_refill() only replenishes the descriptor entries which
belong to the CPU. It works great in the Rx path but the driver must
ensure that all the descriptors are freed before velocity_rx_refill()
is used in velocity_change_mtu(). The patch resets the Rx descriptors
in velocity_free_rd_ring().
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
---
drivers/net/via-velocity.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c
index c2d5907dc8e0..ed1f837c8fda 100644
--- a/drivers/net/via-velocity.c
+++ b/drivers/net/via-velocity.c
@@ -1106,6 +1106,9 @@ static void velocity_free_rd_ring(struct velocity_info *vptr)
for (i = 0; i < vptr->options.numrx; i++) {
struct velocity_rd_info *rd_info = &(vptr->rd_info[i]);
+ struct rx_desc *rd = vptr->rd_ring + i;
+
+ memset(rd, 0, sizeof(*rd));
if (!rd_info->skb)
continue;
--
GitLab