diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2014-06-10 09:40:14 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-11 15:15:31 -0700 |
| commit | 4f809cea611f1f00a0b7a42751cb12d997a4c11c (patch) | |
| tree | 10aa62a6975e4d9a33cadec7fa260cfd3e31a2b6 | |
| parent | 61f83d0d57f1ec42a61b47b0ace97bbf0a8523a3 (diff) | |
| download | apm-4f809cea611f1f00a0b7a42751cb12d997a4c11c.tar.gz | |
net: sh_eth: Fix receive packet "exceeded" condition in sh_eth_rx()
This patch fixes the packet "exceeded" condition in sh_eth_rx() when
RACT in an RX descriptor is not set and the "quota" is 0.
Otherwise, kernel panic happens because the "&n->poll_list" is deleted
twice in sh_eth_poll() which calls napi_complete() and net_rx_action().
Signed-off-by: Kouei Abe <kouei.abe.cp@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/renesas/sh_eth.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index b19a323c8647a6..606dabdb974212 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1399,7 +1399,6 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) int entry = mdp->cur_rx % mdp->num_rx_ring; int boguscnt = (mdp->dirty_rx + mdp->num_rx_ring) - mdp->cur_rx; struct sk_buff *skb; - int exceeded = 0; u16 pkt_len = 0; u32 desc_status; @@ -1411,10 +1410,9 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) if (--boguscnt < 0) break; - if (*quota <= 0) { - exceeded = 1; + if (*quota <= 0) break; - } + (*quota)--; if (!(desc_status & RDFEND)) @@ -1508,7 +1506,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) sh_eth_write(ndev, EDRRR_R, EDRRR); } - return exceeded; + return *quota <= 0; } static void sh_eth_rcv_snd_disable(struct net_device *ndev) |