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Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue

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Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2022-11-18 (iavf)

Ivan Vecera resolves issues related to reset by adding back call to
netif_tx_stop_all_queues() and adding calls to dev_close() to ensure
device is properly closed during reset.

Stefan Assmann removes waiting for setting of MAC address as this breaks
ARP.

Slawomir adds setting of __IAVF_IN_REMOVE_TASK bit to prevent deadlock
between remove and shutdown.

* '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  iavf: Fix race condition between iavf_shutdown and iavf_remove
  iavf: remove INITIAL_MAC_SET to allow gARP to work properly
  iavf: Do not restart Tx queues after reset task failure
  iavf: Fix a crash during reset task
====================

Link: https://lore.kernel.org/r/20221118222439.1565245-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2022-11-21 20:50:12 -08:00
commit 5916380c31
2 changed files with 23 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/intel/iavf/iavf.h
View File

@ -298,7 +298,6 @@ struct iavf_adapter {
#define IAVF_FLAG_QUEUES_DISABLED BIT(17)
#define IAVF_FLAG_SETUP_NETDEV_FEATURES BIT(18)
#define IAVF_FLAG_REINIT_MSIX_NEEDED BIT(20)
#define IAVF_FLAG_INITIAL_MAC_SET BIT(23)
/* duplicates for common code */
#define IAVF_FLAG_DCB_ENABLED 0
/* flags for admin queue service task */

41
drivers/net/ethernet/intel/iavf/iavf_main.c
View File

@ -1087,12 +1087,6 @@ static int iavf_set_mac(struct net_device *netdev, void *p)
if (ret)
return ret;
/* If this is an initial set MAC during VF spawn do not wait */
if (adapter->flags & IAVF_FLAG_INITIAL_MAC_SET) {
adapter->flags &= ~IAVF_FLAG_INITIAL_MAC_SET;
return 0;
}
ret = wait_event_interruptible_timeout(adapter->vc_waitqueue,
iavf_is_mac_set_handled(netdev, addr->sa_data),
msecs_to_jiffies(2500));
@ -2605,8 +2599,6 @@ static void iavf_init_config_adapter(struct iavf_adapter *adapter)
ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
}
adapter->flags |= IAVF_FLAG_INITIAL_MAC_SET;
adapter->tx_desc_count = IAVF_DEFAULT_TXD;
adapter->rx_desc_count = IAVF_DEFAULT_RXD;
err = iavf_init_interrupt_scheme(adapter);
@ -2921,7 +2913,6 @@ static void iavf_disable_vf(struct iavf_adapter *adapter)
iavf_free_queues(adapter);
memset(adapter->vf_res, 0, IAVF_VIRTCHNL_VF_RESOURCE_SIZE);
iavf_shutdown_adminq(&adapter->hw);
adapter->netdev->flags &= ~IFF_UP;
adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
iavf_change_state(adapter, __IAVF_DOWN);
wake_up(&adapter->down_waitqueue);
@ -3021,6 +3012,11 @@ static void iavf_reset_task(struct work_struct *work)
iavf_disable_vf(adapter);
mutex_unlock(&adapter->client_lock);
mutex_unlock(&adapter->crit_lock);
if (netif_running(netdev)) {
rtnl_lock();
dev_close(netdev);
rtnl_unlock();
}
return; /* Do not attempt to reinit. It's dead, Jim. */
}
@ -3033,6 +3029,7 @@ continue_reset:
if (running) {
netif_carrier_off(netdev);
netif_tx_stop_all_queues(netdev);
adapter->link_up = false;
iavf_napi_disable_all(adapter);
}
@ -3172,6 +3169,16 @@ reset_err:
mutex_unlock(&adapter->client_lock);
mutex_unlock(&adapter->crit_lock);
if (netif_running(netdev)) {
/* Close device to ensure that Tx queues will not be started
* during netif_device_attach() at the end of the reset task.
*/
rtnl_lock();
dev_close(netdev);
rtnl_unlock();
}
dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
reset_finish:
rtnl_lock();
@ -5035,23 +5042,21 @@ static int __maybe_unused iavf_resume(struct device *dev_d)
static void iavf_remove(struct pci_dev *pdev)
{
struct iavf_adapter *adapter = iavf_pdev_to_adapter(pdev);
struct net_device *netdev = adapter->netdev;
struct iavf_fdir_fltr *fdir, *fdirtmp;
struct iavf_vlan_filter *vlf, *vlftmp;
struct iavf_cloud_filter *cf, *cftmp;
struct iavf_adv_rss *rss, *rsstmp;
struct iavf_mac_filter *f, *ftmp;
struct iavf_cloud_filter *cf, *cftmp;
struct iavf_hw *hw = &adapter->hw;
struct net_device *netdev;
struct iavf_hw *hw;
int err;
/* When reboot/shutdown is in progress no need to do anything
* as the adapter is already REMOVE state that was set during
* iavf_shutdown() callback.
*/
if (adapter->state == __IAVF_REMOVE)
netdev = adapter->netdev;
hw = &adapter->hw;
if (test_and_set_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
return;
set_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section);
/* Wait until port initialization is complete.
* There are flows where register/unregister netdev may race.
*/