From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Chan" Subject: [PATCH 1/2] bnx2: Fix netpoll crash. Date: Tue, 23 Mar 2010 15:13:11 -0800 Message-ID: <1269385992-18525-1-git-send-email-mchan@broadcom.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: davem@davemloft.net Return-path: Received: from mms2.broadcom.com ([216.31.210.18]:4811 "EHLO mms2.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753967Ab0CWXC4 (ORCPT ); Tue, 23 Mar 2010 19:02:56 -0400 Sender: netdev-owner@vger.kernel.org List-ID: From: Benjamin Li 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 Signed-off-by: Michael Chan --- drivers/net/bnx2.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 381887b..417de1c 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -246,6 +246,8 @@ 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; @@ -6197,6 +6199,7 @@ 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) @@ -8207,7 +8210,7 @@ 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); @@ -8276,7 +8279,6 @@ 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); -- 1.6.4.GIT