diff options
| author | Nithin Nayak Sujir <nsujir@broadcom.com> | 2013-01-14 17:10:59 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-02-20 03:15:39 +0000 |
| commit | ac7551bedf950ef638df23badb0df0a7ca8045fd (patch) | |
| tree | 0758be3100c25b751f59d566355ab25382b8ffda | |
| parent | 335c3391c34f5a607ca63d606f9b2d9f747bab4a (diff) | |
tg3: Avoid null pointer dereference in tg3_interrupt in netconsole mode
[ Upstream commit 9c13cb8bb477a83b9a3c9e5a5478a4e21294a760 ]
When netconsole is enabled, logging messages generated during tg3_open
can result in a null pointer dereference for the uninitialized tg3
status block. Use the irq_sync flag to disable polling in the early
stages. irq_sync is cleared when the driver is enabling interrupts after
all initialization is completed.
Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 01bc10205fd9..c3197d9115bf 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -6353,6 +6353,9 @@ static void tg3_poll_controller(struct net_device *dev) int i; struct tg3 *tp = netdev_priv(dev); + if (tg3_irq_sync(tp)) + return; + for (i = 0; i < tp->irq_cnt; i++) tg3_interrupt(tp->napi[i].irq_vec, &tp->napi[i]); } @@ -15388,6 +15391,7 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, tp->pm_cap = pm_cap; tp->rx_mode = TG3_DEF_RX_MODE; tp->tx_mode = TG3_DEF_TX_MODE; + tp->irq_sync = 1; if (tg3_debug > 0) tp->msg_enable = tg3_debug; |