[Intel-wired-lan] [next-queue v2] i40e: Introduce recovery mode support
Shannon Nelson
shannon.nelson at oracle.com
Tue Aug 14 22:56:40 UTC 2018
On 8/14/2018 2:24 PM, Jeff Kirsher wrote:
> From: Alice Michael <alice.michael at intel.com>
>
> This patch introduces "recovery mode" to the i40e driver. It is
> part of a new Any2Any idea of upgrading the firmware. In this
> approach, it is required for the driver to have support for
> "transition firmware", that is used for migrating from structured
> to flat firmware image. In this new, very basic mode, i40e driver
> must be able to handle particular IOCTL calls from the NVM Update
> Tool and run a small set of AQ commands.
>
> Signed-off-by: Alice Michael <alice.michael at intel.com>
> ---
> v2: combined all the patch in S94 into one patch because Shannon
> Nelson pointed out that all the patches in the series were either
That's right, blame it all on me... :-) I actually didn't mind the
separate patches to build up the new feature, like what I recently sent
up for ixgbevf. What I don't like to see are several bugfix patches in
the same patches as the original feature patches - why display to the
world these shortcomings? Just roll the internal bugfix patches into
the appropriate feature patches before going public.
However, this one big patch doesn't seem so bad.
> introducing the recovery mode support or fixing the new feature
> Also added 2 additional fixes which were found in testing.
What are the additional fixes?
Well, anyway, a few more comments below.
>
> drivers/net/ethernet/intel/i40e/i40e.h | 1
> drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 14 +
> drivers/net/ethernet/intel/i40e/i40e_main.c | 330 ++++++++++++++++++++++--
> 3 files changed, 311 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
> index 7a80652e2500..db911e38dde2 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e.h
> @@ -140,6 +140,7 @@ enum i40e_state_t {
> __I40E_RESET_FAILED,
> __I40E_PORT_SUSPENDED,
> __I40E_VF_DISABLE,
> + __I40E_RECOVERY_MODE,
> __I40E_MACVLAN_SYNC_PENDING,
> __I40E_UDP_FILTER_SYNC_PENDING,
> __I40E_TEMP_LINK_POLLING,
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> index abcd096ede14..19606a2a694e 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> @@ -4829,6 +4829,12 @@ static int i40e_get_module_eeprom(struct net_device *netdev,
> return 0;
> }
>
> +static const struct ethtool_ops i40e_ethtool_recovery_mode_ops = {
> + .set_eeprom = i40e_set_eeprom,
> + .get_eeprom_len = i40e_get_eeprom_len,
> + .get_eeprom = i40e_get_eeprom,
> +};
> +
> static const struct ethtool_ops i40e_ethtool_ops = {
> .get_drvinfo = i40e_get_drvinfo,
> .get_regs_len = i40e_get_regs_len,
> @@ -4874,5 +4880,11 @@ static const struct ethtool_ops i40e_ethtool_ops = {
>
> void i40e_set_ethtool_ops(struct net_device *netdev)
> {
> - netdev->ethtool_ops = &i40e_ethtool_ops;
> + struct i40e_netdev_priv *np = netdev_priv(netdev);
> + struct i40e_pf *pf = np->vsi->back;
> +
> + if (!test_bit(__I40E_RECOVERY_MODE, pf->state))
> + netdev->ethtool_ops = &i40e_ethtool_ops;
> + else
> + netdev->ethtool_ops = &i40e_ethtool_recovery_mode_ops;
> }
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index f2c622e78802..e0d805dbc064 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -44,6 +44,10 @@ static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
> static void i40e_prep_for_reset(struct i40e_pf *pf, bool lock_acquired);
> static int i40e_reset(struct i40e_pf *pf);
> static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired);
> +static int i40e_setup_misc_vector_for_recovery_mode(struct i40e_pf *pf);
> +static int i40e_restore_interrupt_scheme(struct i40e_pf *pf);
> +static bool i40e_check_recovery_mode(struct i40e_pf *pf);
> +static int i40e_init_recovery_mode(struct i40e_pf *pf, struct i40e_hw *hw);
> static void i40e_fdir_sb_setup(struct i40e_pf *pf);
> static int i40e_veb_get_bw_info(struct i40e_veb *veb);
> static int i40e_get_capabilities(struct i40e_pf *pf,
> @@ -276,8 +280,9 @@ struct i40e_vsi *i40e_find_vsi_from_id(struct i40e_pf *pf, u16 id)
> **/
> void i40e_service_event_schedule(struct i40e_pf *pf)
> {
> - if (!test_bit(__I40E_DOWN, pf->state) &&
> - !test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
> + if ((!test_bit(__I40E_DOWN, pf->state) &&
> + !test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state)) ||
> + test_bit(__I40E_RECOVERY_MODE, pf->state))
> queue_work(i40e_wq, &pf->service_task);
> }
>
> @@ -3927,7 +3932,8 @@ static irqreturn_t i40e_intr(int irq, void *data)
> enable_intr:
> /* re-enable interrupt causes */
> wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
> - if (!test_bit(__I40E_DOWN, pf->state)) {
> + if (!test_bit(__I40E_DOWN, pf->state) ||
> + test_bit(__I40E_RECOVERY_MODE, pf->state)) {
> i40e_service_event_schedule(pf);
> i40e_irq_dynamic_enable_icr0(pf);
> }
> @@ -9326,6 +9332,7 @@ static int i40e_reset(struct i40e_pf *pf)
> **/
> static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
> {
> + int old_recovery_mode_bit = test_bit(__I40E_RECOVERY_MODE, pf->state);
> struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
> struct i40e_hw *hw = &pf->hw;
> u8 set_fc_aq_fail = 0;
> @@ -9333,7 +9340,14 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
> u32 val;
> int v;
>
> - if (test_bit(__I40E_DOWN, pf->state))
> + if (test_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state) &&
> + i40e_check_recovery_mode(pf)) {
> + i40e_set_ethtool_ops(pf->vsi[pf->lan_vsi]->netdev);
> + }
> +
> + if (test_bit(__I40E_DOWN, pf->state) &&
> + !test_bit(__I40E_RECOVERY_MODE, pf->state) &&
> + !old_recovery_mode_bit)
> goto clear_recovery;
> dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");
>
> @@ -9359,8 +9373,47 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
> }
>
> /* re-verify the eeprom if we just had an EMP reset */
> - if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state))
> + if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state)) {
> i40e_verify_eeprom(pf);
> + }
{}'s unnecessary
> +
> + /* if we are going out of or into recovery mode we have to act
> + * accordingly with regard to resources initialization
> + * and deinitialization
> + */
> + if (test_bit(__I40E_RECOVERY_MODE, pf->state) ||
> + old_recovery_mode_bit) {
> + if (i40e_get_capabilities(pf,
> + i40e_aqc_opc_list_func_capabilities))
> + goto end_unlock;
> +
> + if (test_bit(__I40E_RECOVERY_MODE, pf->state)) {
> + /* we're staying in recovery mode so we'll reinitialize
> + * misc vector here
> + */
> + if (i40e_setup_misc_vector_for_recovery_mode(pf))
> + goto end_unlock;
> + } else {
> + if (!lock_acquired)
> + rtnl_lock();
> + /* we're going out of recovery mode so we'll free
> + * the IRQ allocated specifically for recovery mode
> + * and restore the interrupt scheme
> + */
> + free_irq(pf->pdev->irq, pf);
> + i40e_clear_interrupt_scheme(pf);
> + if (i40e_restore_interrupt_scheme(pf))
> + goto end_unlock;
> + }
> +
> + /* tell the firmware that we're starting */
> + i40e_send_version(pf);
> +
> + /* bail out in case recovery mode was detected, as there is
> + * no need for further configuration.
> + */
> + goto end_unlock;
> + }
>
> i40e_clear_pxe_mode(hw);
> ret = i40e_get_capabilities(pf, i40e_aqc_opc_list_func_capabilities);
> @@ -9828,25 +9881,31 @@ static void i40e_service_task(struct work_struct *work)
> if (test_and_set_bit(__I40E_SERVICE_SCHED, pf->state))
> return;
>
> - i40e_detect_recover_hung(pf->vsi[pf->lan_vsi]);
> - i40e_sync_filters_subtask(pf);
> - i40e_reset_subtask(pf);
> - i40e_handle_mdd_event(pf);
> - i40e_vc_process_vflr_event(pf);
> - i40e_watchdog_subtask(pf);
> - i40e_fdir_reinit_subtask(pf);
> - if (test_and_clear_bit(__I40E_CLIENT_RESET, pf->state)) {
> - /* Client subtask will reopen next time through. */
> - i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], true);
> - } else {
> - i40e_client_subtask(pf);
> - if (test_and_clear_bit(__I40E_CLIENT_L2_CHANGE,
> - pf->state))
> - i40e_notify_client_of_l2_param_changes(
> + if (!test_bit(__I40E_RECOVERY_MODE, pf->state)) {
> + i40e_detect_recover_hung(pf->vsi[pf->lan_vsi]);
> + i40e_sync_filters_subtask(pf);
> + i40e_reset_subtask(pf);
> + i40e_handle_mdd_event(pf);
> + i40e_vc_process_vflr_event(pf);
> + i40e_watchdog_subtask(pf);
> + i40e_fdir_reinit_subtask(pf);
> + if (test_and_clear_bit(__I40E_CLIENT_RESET, pf->state)) {
> + /* Client subtask will reopen next time through. */
> + i40e_notify_client_of_netdev_close(
> + pf->vsi[pf->lan_vsi], true);
> + } else {
> + i40e_client_subtask(pf);
> + if (test_and_clear_bit(__I40E_CLIENT_L2_CHANGE,
> + pf->state))
> + i40e_notify_client_of_l2_param_changes(
> pf->vsi[pf->lan_vsi]);
> + }
> + i40e_sync_udp_filters_subtask(pf);
> +
> + } else {
> + i40e_reset_subtask(pf);
> }
> i40e_sync_filters_subtask(pf);
> - i40e_sync_udp_filters_subtask(pf);
> i40e_clean_adminq_subtask(pf);
>
> /* flush memory to make sure state is correct before next watchdog */
> @@ -10660,6 +10719,48 @@ static int i40e_restore_interrupt_scheme(struct i40e_pf *pf)
> return err;
> }
>
> +/**
> + * i40e_setup_misc_vector_for_recovery_mode - Setup the misc vector to handle
> + * non queue events in recovery mode
This is the "short" description and should only be one line, no wrapping.
Can we shorten this function name? This is getting even more out of
hand than when i40e started.
> + * @pf: board private structure
> + *
> + * This sets up the handler for MSIX 0 or MSI/legacy, which is used to manage
> + * the non-queue interrupts, e.g. AdminQ and errors in recovery mode.
> + * This is handled differently than in recovery mode since no Tx/Rx resources
> + * are being allocated.
> + **/
> +static int i40e_setup_misc_vector_for_recovery_mode(struct i40e_pf *pf)
> +{
> + int err;
> +
> + if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
> + err = i40e_setup_misc_vector(pf);
> +
> + if (err) {
> + dev_info(&pf->pdev->dev,
> + "MSI-X misc vector request failed, error %d\n",
> + err);
Why bother with this print when i40e_setup_misc_vector(pf) already is
going to print a complaint?
> + return err;
> + }
> + } else {
> + u32 flags = pf->flags & I40E_FLAG_MSI_ENABLED ? 0 : IRQF_SHARED;
> +
> + err = request_irq(pf->pdev->irq, i40e_intr, flags,
> + pf->int_name, pf);
> +
> + if (err) {
> + dev_info(&pf->pdev->dev,
> + "MSI/legacy misc vector request failed, error %d\n",
> + err);
> + return err;
> + }
> + i40e_enable_misc_int_causes(pf);
> + i40e_irq_dynamic_enable_icr0(pf);
> + }
> +
> + return 0;
This function can be simplified to
> + u32 flags = pf->flags & I40E_FLAG_MSI_ENABLED ? 0 : IRQF_SHARED;
> +
> + if (pf->flags & I40E_FLAG_MSIX_ENABLED)
> + return i40e_setup_misc_vector(pf);
> +
> + err = request_irq(pf->pdev->irq, i40e_intr, flags,
> + pf->int_name, pf);
> + if (err) {
> + dev_info(&pf->pdev->dev,
> + "MSI/legacy misc vector request failed, error %d\n",
> + err);
> + return err;
> + }
> + i40e_enable_misc_int_causes(pf);
> + i40e_irq_dynamic_enable_icr0(pf);
> +
> + return 0;
> +}
> +
> /**
> * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
> * @pf: board private structure
> @@ -13524,6 +13625,127 @@ static void i40e_get_platform_mac_addr(struct pci_dev *pdev, struct i40e_pf *pf)
> i40e_get_mac_addr(&pf->hw, pf->hw.mac.addr);
> }
>
> +/**
> + * i40e_check_recovery_mode - check if we are running transition firmware
> + * @pf: board private structure
> + *
> + * Check registers indicating the firmware runs in recovery mode. Sets the
> + * appropriate driver state.
> + *
> + * Returns true if the recovery mode was detected, false otherwise
> + **/
> +static bool i40e_check_recovery_mode(struct i40e_pf *pf)
> +{
> + u32 val = rd32(&pf->hw, I40E_GL_FWSTS);
> +
> + if (val & I40E_GL_FWSTS_FWS1B_MASK) {
> + dev_notice(&pf->pdev->dev, "Firmware recovery mode detected. Limiting functionality.\n");
> + dev_notice(&pf->pdev->dev, "Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode.\n");
> + set_bit(__I40E_RECOVERY_MODE, pf->state);
> +
> + return true;
> + }
> + if (test_and_clear_bit(__I40E_RECOVERY_MODE, pf->state))
> + dev_info(&pf->pdev->dev, "Reinitializing in normal mode with full functionality.\n");
> +
> + return false;
> +}
> +
> +/**
> + * i40e_init_recovery_mode - initialize subsystems needed in recovery mode
> + * @pf: board private structure
> + * @hw: ptr to the hardware info
> + *
> + * This function does a minimal setup of all subsystems needed for running
> + * recovery mode.
You might add a little comment that this hijacks and completes the
probe() process for recovery mode.
> + *
> + * Returns 0 on success, negative on failure
> + **/
> +static int i40e_init_recovery_mode(struct i40e_pf *pf, struct i40e_hw *hw)
> +{
> + struct i40e_vsi *vsi;
> + int err;
> + int v_idx;
Insert the dreaded reverse Xmas tree comment here.
> +
> + pci_save_state(pf->pdev);
> +
> + /* set up periodic task facility */
> + timer_setup(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
> + pf->service_timer_period = HZ;
> +
> + INIT_WORK(&pf->service_task, i40e_service_task);
> + clear_bit(__I40E_SERVICE_SCHED, pf->state);
> +
> + err = i40e_init_interrupt_scheme(pf);
> + if (err)
> + goto err_switch_setup;
> +
> + /* The number of VSIs reported by the FW is the minimum guaranteed
> + * to us; HW supports far more and we share the remaining pool with
> + * the other PFs. We allocate space for more than the guarantee with
> + * the understanding that we might not get them all later.
> + */
This comment doesn't make much sense here in the recovery mode since
you're really only going to build up one VSI anyway.
> + if (pf->hw.func_caps.num_vsis < I40E_MIN_VSI_ALLOC)
> + pf->num_alloc_vsi = I40E_MIN_VSI_ALLOC;
> + else
> + pf->num_alloc_vsi = pf->hw.func_caps.num_vsis;
You could probably even simplify this to
pf->num_alloc_vsi = 1;
> +
> + /* Set up the vsi struct and our local tracking of the MAIN PF vsi. */
> + pf->vsi = kcalloc(pf->num_alloc_vsi, sizeof(struct i40e_vsi *),
> + GFP_KERNEL);
> + if (!pf->vsi) {
> + err = -ENOMEM;
> + goto err_switch_setup;
> + }
> +
> + /* We allocate one VSI which is needed as absolute minimum
> + * in order to register the netdev
> + */
> + v_idx = i40e_vsi_mem_alloc(pf, I40E_VSI_MAIN);
> + if (v_idx < 0)
> + goto err_switch_setup;
> + pf->lan_vsi = v_idx;
> + vsi = pf->vsi[v_idx];
> + if (!vsi)
> + goto err_switch_setup;
> + vsi->alloc_queue_pairs = 1;
> + err = i40e_config_netdev(vsi);
> + if (err)
> + goto err_switch_setup;
> + err = register_netdev(vsi->netdev);
> + if (err)
> + goto err_switch_setup;
> + vsi->netdev_registered = true;
> + i40e_dbg_pf_init(pf);
> +
> + err = i40e_setup_misc_vector_for_recovery_mode(pf);
> + if (err)
> + goto err_switch_setup;
> +
> + /* tell the firmware that we're starting */
> + i40e_send_version(pf);
> +
> + /* since everything's happy, start the service_task timer */
> + mod_timer(&pf->service_timer,
> + round_jiffies(jiffies + pf->service_timer_period));
> +
> + return 0;
> +
> +err_switch_setup:
> + i40e_reset_interrupt_capability(pf);
> + del_timer_sync(&pf->service_timer);
> + i40e_shutdown_adminq(hw);
> + iounmap(hw->hw_addr);
> + pci_disable_pcie_error_reporting(pf->pdev);
> + pci_release_selected_regions(pf->pdev,
> + pci_select_bars(pf->pdev,
> + IORESOURCE_MEM));
> + pci_disable_device(pf->pdev);
> + kfree(pf);
> +
> + return err;
> +}
> +
> /**
> * i40e_probe - Device initialization routine
> * @pdev: PCI device information struct
> @@ -13648,12 +13870,15 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>
> /* Reset here to make sure all is clean and to define PF 'n' */
> i40e_clear_hw(hw);
> - err = i40e_pf_reset(hw);
> - if (err) {
> - dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
> - goto err_pf_reset;
> + if (!i40e_check_recovery_mode(pf)) {
> + err = i40e_pf_reset(hw);
> + if (err) {
> + dev_info(&pdev->dev, "Initial pf_reset failed: %d\n",
> + err);
> + goto err_pf_reset;
> + }
> + pf->pfr_count++;
> }
> - pf->pfr_count++;
>
> hw->aq.num_arq_entries = I40E_AQ_LEN;
> hw->aq.num_asq_entries = I40E_AQ_LEN;
> @@ -13719,6 +13944,9 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> goto err_sw_init;
> }
>
> + if (test_bit(__I40E_RECOVERY_MODE, pf->state))
> + return i40e_init_recovery_mode(pf, hw);
> +
You might put a comment above this bit to warn the reader that you're
hijacking the probe process.
> err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
> hw->func_caps.num_rx_qp, 0, 0);
> if (err) {
> @@ -14101,6 +14329,20 @@ static void i40e_remove(struct pci_dev *pdev)
> if (pf->service_task.func)
> cancel_work_sync(&pf->service_task);
>
> + if (test_bit(__I40E_RECOVERY_MODE, pf->state)) {
> + struct i40e_vsi *vsi = pf->vsi[0];
> +
> + /* We know that we have allocated only one vsi for this PF,
> + * * it was just for registering netdevice, so the interface
Funky "* *" comment prefix
> + * could be visible in the 'ifconfig' output
> + */
> + unregister_netdev(vsi->netdev);
> + free_netdev(vsi->netdev);
> + vsi->netdev = NULL;
> +
> + goto unmap;
Why is there a special VSI teardown and then a jump? Why doesn't the
normal path work here? Hitting the client and fdir and cloud teardown
code should end up a no-op anyway. This is the beginning of spagetti code.
> + }
> +
> /* Client close must be called explicitly here because the timer
> * has been stopped.
> */
> @@ -14150,23 +14392,35 @@ static void i40e_remove(struct pci_dev *pdev)
> ret_code);
> }
>
> - /* shutdown the adminq */
> - i40e_shutdown_adminq(hw);
> -
> - /* destroy the locks only once, here */
> - mutex_destroy(&hw->aq.arq_mutex);
> - mutex_destroy(&hw->aq.asq_mutex);
> +unmap:
> + /* Free MSI/legacy interrupt 0 when in recovery mode.
> + * This is normally done in i40e_vsi_free_irq on
> + * VSI close but since recovery mode doesn't allow to up
> + * an interface and we do not allocate all Rx/Tx resources
> + * for it we'll just do it here
> + */
> + if (test_bit(__I40E_RECOVERY_MODE, pf->state) &&
> + !(pf->flags & I40E_FLAG_MSIX_ENABLED))
> + free_irq(pf->pdev->irq, pf);
>
> /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
> i40e_clear_interrupt_scheme(pf);
> for (i = 0; i < pf->num_alloc_vsi; i++) {
> if (pf->vsi[i]) {
> - i40e_vsi_clear_rings(pf->vsi[i]);
> + if (!test_bit(__I40E_RECOVERY_MODE, pf->state))
> + i40e_vsi_clear_rings(pf->vsi[i]);
Does it really break anything if i40e_vsi_clear_rings() is called on
something with no rings? It shouldn't. This seems unnecessary.
> i40e_vsi_clear(pf->vsi[i]);
> pf->vsi[i] = NULL;
> }
> }
>
> + /* shutdown the adminq */
> + i40e_shutdown_adminq(hw);
> +
> + /* destroy the locks only once, here */
> + mutex_destroy(&hw->aq.arq_mutex);
> + mutex_destroy(&hw->aq.asq_mutex);
> +
> for (i = 0; i < I40E_MAX_VEB; i++) {
> kfree(pf->veb[i]);
> pf->veb[i] = NULL;
> @@ -14377,6 +14631,16 @@ static void i40e_shutdown(struct pci_dev *pdev)
> wr32(hw, I40E_PFPM_WUFC,
> (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
>
> + /* Free MSI/legacy interrupt 0 when in recovery mode.
> + * This is normally done in i40e_vsi_free_irq on
> + * VSI close but since recovery mode doesn't allow to up
> + * an interface and we do not allocate all Rx/Tx resources
> + * for it we'll just do it here
> + */
> + if (test_bit(__I40E_RECOVERY_MODE, pf->state) &&
> + !(pf->flags & I40E_FLAG_MSIX_ENABLED))
> + free_irq(pf->pdev->irq, pf);
> +
> i40e_clear_interrupt_scheme(pf);
>
> if (system_state == SYSTEM_POWER_OFF) {
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