[PATCH] net/temac: FIX segfault when process old irqs
From: Ricardo Ribalda Delgado <hidden>
Date: 2011-11-08 09:32:07
Also in:
lkml
Subsystem:
networking drivers, the rest, xilinx ll temac ethernet driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Do not enable the irq until the scatter gather registers are ready to handle the data. Otherwise an irq from a packet send/received before last close can lead to an access to an invalid memory region on the irq handler. Also, stop the dma engine on close. Signed-off-by: Ricardo Ribalda Delgado <redacted> --- drivers/net/ethernet/xilinx/ll_temac_main.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index 4d1658e..c8db76a 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c@@ -203,6 +203,9 @@ static void temac_dma_bd_release(struct net_device *ndev) struct temac_local *lp = netdev_priv(ndev); int i; + /* Reset Local Link (DMA) */ + lp->dma_out(lp, DMA_CONTROL_REG, DMA_CONTROL_RST); + for (i = 0; i < RX_BD_NUM; i++) { if (!lp->rx_skb[i]) break;
@@ -860,6 +863,8 @@ static int temac_open(struct net_device *ndev) phy_start(lp->phy_dev); } + temac_device_reset(ndev); + rc = request_irq(lp->tx_irq, ll_temac_tx_irq, 0, ndev->name, ndev); if (rc) goto err_tx_irq;
@@ -867,7 +872,6 @@ static int temac_open(struct net_device *ndev) if (rc) goto err_rx_irq; - temac_device_reset(ndev); return 0; err_rx_irq:
--
1.7.7.1