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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>
hifive-unleashed-5.1
Francois Romieu 2006-02-27 23:11:08 +01:00
parent de5f503cfb
commit b3c3e7d7d9
1 changed files with 3 additions and 0 deletions
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drivers/net/via-velocity.c
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@ -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;