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authorBenjamin Li <benli@broadcom.com>2010-03-23 13:13:11 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2010-09-26 17:21:32 -0700
commit508d1ab51e66eb8f50acba0301524b09babe37b3 (patch)
tree3a1c5a2482d5957ba211bc9ca8754abafe42e990
parent06f796fb6a720e5b3b56d0ba08c968d82a48f60b (diff)
bnx2: Fix netpoll crash.
commit 4327ba435a56ada13eedf3eb332e583c7a0586a9 upstream. The bnx2 driver calls netif_napi_add() for all the NAPI structs during ->probe() time but not all of them will be used if we're not in MSI-X mode. This creates a problem for netpoll since it will poll all the NAPI structs in the dev_list whether or not they are scheduled, resulting in a crash when we access structure fields not initialized for that vector. We fix it by moving the netif_napi_add() call to ->open() after the number of IRQ vectors has been determined. Signed-off-by: Benjamin Li <benli@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/net/bnx2.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index a9aa957f3a7e..bb73d1ac6650 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -247,6 +247,8 @@ static const struct flash_spec flash_5709 = {
MODULE_DEVICE_TABLE(pci, bnx2_pci_tbl);
+static void bnx2_init_napi(struct bnx2 *bp);
+
static inline u32 bnx2_tx_avail(struct bnx2 *bp, struct bnx2_tx_ring_info *txr)
{
u32 diff;
@@ -6173,6 +6175,7 @@ bnx2_open(struct net_device *dev)
bnx2_disable_int(bp);
bnx2_setup_int_mode(bp, disable_msi);
+ bnx2_init_napi(bp);
bnx2_napi_enable(bp);
rc = bnx2_alloc_mem(bp);
if (rc)
@@ -8021,7 +8024,7 @@ bnx2_init_napi(struct bnx2 *bp)
{
int i;
- for (i = 0; i < BNX2_MAX_MSIX_VEC; i++) {
+ for (i = 0; i < bp->irq_nvecs; i++) {
struct bnx2_napi *bnapi = &bp->bnx2_napi[i];
int (*poll)(struct napi_struct *, int);
@@ -8090,7 +8093,6 @@ bnx2_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->ethtool_ops = &bnx2_ethtool_ops;
bp = netdev_priv(dev);
- bnx2_init_napi(bp);
pci_set_drvdata(pdev, dev);