From a1f6c6b147cc5e83ec36dab8370bd5ec5fa1def6 Mon Sep 17 00:00:00 2001 From: xunleer Date: Tue, 5 Mar 2013 07:44:20 +0000 Subject: ixgbevf: don't release the soft entries When the ixgbevf driver is opened the request to allocate MSIX irq vectors may fail. In that case the driver will call ixgbevf_down() which will call ixgbevf_irq_disable() to clear the HW interrupt registers and calls synchronize_irq() using the msix_entries pointer in the adapter structure. However, when the function to request the MSIX irq vectors failed it had already freed the msix_entries which causes an OOPs from using the NULL pointer in synchronize_irq(). The calls to pci_disable_msix() and to free the msix_entries memory should not occur if device open fails. Instead they should be called during device driver removal to balance with the call to pci_enable_msix() and the call to allocate msix_entries memory during the device probe and driver load. Signed-off-by: Li Xun Signed-off-by: Greg Rose Tested-by: Sibai Li Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 24 +++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index c3db6cd69b6..2b6cb5ca48e 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -944,9 +944,17 @@ free_queue_irqs: free_irq(adapter->msix_entries[vector].vector, adapter->q_vector[vector]); } - pci_disable_msix(adapter->pdev); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; + /* This failure is non-recoverable - it indicates the system is + * out of MSIX vector resources and the VF driver cannot run + * without them. Set the number of msix vectors to zero + * indicating that not enough can be allocated. The error + * will be returned to the user indicating device open failed. + * Any further attempts to force the driver to open will also + * fail. The only way to recover is to unload the driver and + * reload it again. If the system has recovered some MSIX + * vectors then it may succeed. + */ + adapter->num_msix_vectors = 0; return err; } @@ -2572,6 +2580,15 @@ static int ixgbevf_open(struct net_device *netdev) struct ixgbe_hw *hw = &adapter->hw; int err; + /* A previous failure to open the device because of a lack of + * available MSIX vector resources may have reset the number + * of msix vectors variable to zero. The only way to recover + * is to unload/reload the driver and hope that the system has + * been able to recover some MSIX vector resources. + */ + if (!adapter->num_msix_vectors) + return -ENOMEM; + /* disallow open during test */ if (test_bit(__IXGBEVF_TESTING, &adapter->state)) return -EBUSY; @@ -2628,7 +2645,6 @@ static int ixgbevf_open(struct net_device *netdev) err_req_irq: ixgbevf_down(adapter); - ixgbevf_free_irq(adapter); err_setup_rx: ixgbevf_free_all_rx_resources(adapter); err_setup_tx: -- cgit v1.2.3-70-g09d2 From 22c12752d183f39aa8e2cc884cfcb23c0cb6d98d Mon Sep 17 00:00:00 2001 From: Lior Levy Date: Tue, 12 Mar 2013 15:49:32 +0000 Subject: igb: fix i350 anti spoofing config Fix a problem in i350 where anti spoofing configuration was written into a wrong register. Signed-off-by: Lior Levy Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/e1000_82575.c | 33 ++++++++++++++++------------ 1 file changed, 19 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/igb/e1000_82575.c b/drivers/net/ethernet/intel/igb/e1000_82575.c index b64542acfa3..12b1d848080 100644 --- a/drivers/net/ethernet/intel/igb/e1000_82575.c +++ b/drivers/net/ethernet/intel/igb/e1000_82575.c @@ -1818,27 +1818,32 @@ out: **/ void igb_vmdq_set_anti_spoofing_pf(struct e1000_hw *hw, bool enable, int pf) { - u32 dtxswc; + u32 reg_val, reg_offset; switch (hw->mac.type) { case e1000_82576: + reg_offset = E1000_DTXSWC; + break; case e1000_i350: - dtxswc = rd32(E1000_DTXSWC); - if (enable) { - dtxswc |= (E1000_DTXSWC_MAC_SPOOF_MASK | - E1000_DTXSWC_VLAN_SPOOF_MASK); - /* The PF can spoof - it has to in order to - * support emulation mode NICs */ - dtxswc ^= (1 << pf | 1 << (pf + MAX_NUM_VFS)); - } else { - dtxswc &= ~(E1000_DTXSWC_MAC_SPOOF_MASK | - E1000_DTXSWC_VLAN_SPOOF_MASK); - } - wr32(E1000_DTXSWC, dtxswc); + reg_offset = E1000_TXSWC; break; default: - break; + return; + } + + reg_val = rd32(reg_offset); + if (enable) { + reg_val |= (E1000_DTXSWC_MAC_SPOOF_MASK | + E1000_DTXSWC_VLAN_SPOOF_MASK); + /* The PF can spoof - it has to in order to + * support emulation mode NICs + */ + reg_val ^= (1 << pf | 1 << (pf + MAX_NUM_VFS)); + } else { + reg_val &= ~(E1000_DTXSWC_MAC_SPOOF_MASK | + E1000_DTXSWC_VLAN_SPOOF_MASK); } + wr32(reg_offset, reg_val); } /** -- cgit v1.2.3-70-g09d2 From d0f63acc2ff354a525f7bc7ba90e81f49b6c2ef8 Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Wed, 13 Mar 2013 15:50:24 +0000 Subject: igb: Fix null pointer dereference The max_vfs= option has always been self limiting to the number of VFs supported by the device. fa44f2f1 added SR-IOV configuration via sysfs, but in the process broke this self correction factor. The failing path is: igb_probe igb_sw_init if (max_vfs > 7) { adapter->vfs_allocated_count = 7; ... igb_probe_vfs igb_enable_sriov(, max_vfs) if (num_vfs > 7) { err = -EPERM; ... This leaves vfs_allocated_count = 7 and vf_data = NULL, so we bomb out when igb_probe finally calls igb_reset. It seems like a really bad idea, and somewhat pointless, to set vfs_allocated_count separate from vf_data, but limiting max_vfs is enough to avoid the null pointer. Signed-off-by: Alex Williamson Acked-by: Greg Rose Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 4dbd62968c7..2ae888678b2 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -2652,7 +2652,7 @@ static int igb_sw_init(struct igb_adapter *adapter) if (max_vfs > 7) { dev_warn(&pdev->dev, "Maximum of 7 VFs per PF, using max\n"); - adapter->vfs_allocated_count = 7; + max_vfs = adapter->vfs_allocated_count = 7; } else adapter->vfs_allocated_count = max_vfs; if (adapter->vfs_allocated_count) -- cgit v1.2.3-70-g09d2 From d5e51a10d21761faaf069cac6f1c0311cf332820 Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Wed, 13 Mar 2013 15:50:29 +0000 Subject: igb: SR-IOV init reordering igb is ineffective at setting a lower total VFs because: int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) { ... /* Shouldn't change if VFs already enabled */ if (dev->sriov->ctrl & PCI_SRIOV_CTRL_VFE) return -EBUSY; Swap init ordering. Signed-off-by: Alex Williamson Acked-by: Greg Rose Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 2ae888678b2..8496adfc6a6 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -2542,8 +2542,8 @@ static void igb_probe_vfs(struct igb_adapter *adapter) if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) return; - igb_enable_sriov(pdev, max_vfs); pci_sriov_set_totalvfs(pdev, 7); + igb_enable_sriov(pdev, max_vfs); #endif /* CONFIG_PCI_IOV */ } -- cgit v1.2.3-70-g09d2 From 05ec29e8fa9b6ec8d4ad5d2f6d5fc5467c7970bc Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 20 Mar 2013 09:06:29 +0000 Subject: igb: make sensor info static Trivial sparse warning. Signed-off-by: Stephen Hemminger Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb_hwmon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/igb/igb_hwmon.c b/drivers/net/ethernet/intel/igb/igb_hwmon.c index 4623502054d..0478a1abe54 100644 --- a/drivers/net/ethernet/intel/igb/igb_hwmon.c +++ b/drivers/net/ethernet/intel/igb/igb_hwmon.c @@ -39,7 +39,7 @@ #include #ifdef CONFIG_IGB_HWMON -struct i2c_board_info i350_sensor_info = { +static struct i2c_board_info i350_sensor_info = { I2C_BOARD_INFO("i350bb", (0Xf8 >> 1)), }; -- cgit v1.2.3-70-g09d2 From 75517d92119a3cd364f618ee962055b3ded8c396 Mon Sep 17 00:00:00 2001 From: Jiri Benc Date: Wed, 20 Mar 2013 09:06:34 +0000 Subject: igb: fix PHC stopping on max freq For 82576 MAC type, max_adj is reported as 1000000000 ppb. However, if this value is passed to igb_ptp_adjfreq_82576, incvalue overflows out of INCVALUE_82576_MASK, resulting in setting of zero TIMINCA.incvalue, stopping the PHC (instead of going at twice the nominal speed). Fix the advertised max_adj value to the largest value hardware can handle. As there is no min_adj value available (-max_adj is used instead), this will also prevent stopping the clock intentionally. It's probably not a big deal, other igb MAC types don't support stopping the clock, either. Signed-off-by: Jiri Benc Acked-by: Matthew Vick Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb_ptp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index 0987822359f..0a237507ee8 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -740,7 +740,7 @@ void igb_ptp_init(struct igb_adapter *adapter) case e1000_82576: snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); adapter->ptp_caps.owner = THIS_MODULE; - adapter->ptp_caps.max_adj = 1000000000; + adapter->ptp_caps.max_adj = 999999881; adapter->ptp_caps.n_ext_ts = 0; adapter->ptp_caps.pps = 0; adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576; -- cgit v1.2.3-70-g09d2