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i40e: Fix missing rtnl locking when setting up pf switch 

A recent change that made i40e use new udp_tunnel infrastructure
uses a method that expects to be called under rtnl lock.

However, not all codepaths do the lock prior to calling
i40e_setup_pf_switch.

Fix that by adding additional rtnl locking and unlocking.

Fixes: 40a98cb6f0 ("i40e: convert to new udp_tunnel infrastructure")
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Jan Sokolowski 2021-06-11 12:01:41 +02:00 committed by Tony Nguyen
parent 26b0ce8dd3
commit 956e759d5f
1 changed files with 11 additions and 4 deletions
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15
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -32,7 +32,7 @@ static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
static void i40e_handle_reset_warning(struct i40e_pf *pf, bool lock_acquired); static void i40e_handle_reset_warning(struct i40e_pf *pf, bool lock_acquired);
static int i40e_add_vsi(struct i40e_vsi *vsi); static int i40e_add_vsi(struct i40e_vsi *vsi);
static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi); static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit); static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit, bool lock_acquired);
static int i40e_setup_misc_vector(struct i40e_pf *pf); static int i40e_setup_misc_vector(struct i40e_pf *pf);
static void i40e_determine_queue_usage(struct i40e_pf *pf); static void i40e_determine_queue_usage(struct i40e_pf *pf);
static int i40e_setup_pf_filter_control(struct i40e_pf *pf); static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
@ -10571,7 +10571,7 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
#endif /* CONFIG_I40E_DCB */ #endif /* CONFIG_I40E_DCB */
if (!lock_acquired) if (!lock_acquired)
rtnl_lock(); rtnl_lock();
ret = i40e_setup_pf_switch(pf, reinit); ret = i40e_setup_pf_switch(pf, reinit, true);
if (ret) if (ret)
goto end_unlock; goto end_unlock;
@ -14629,10 +14629,11 @@ int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
* i40e_setup_pf_switch - Setup the HW switch on startup or after reset * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
* @pf: board private structure * @pf: board private structure
* @reinit: if the Main VSI needs to re-initialized. * @reinit: if the Main VSI needs to re-initialized.
* @lock_acquired: indicates whether or not the lock has been acquired
* *
* Returns 0 on success, negative value on failure * Returns 0 on success, negative value on failure
**/ **/
static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit) static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit, bool lock_acquired)
{ {
u16 flags = 0; u16 flags = 0;
int ret; int ret;
@ -14734,9 +14735,15 @@ static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
i40e_ptp_init(pf); i40e_ptp_init(pf);
if (!lock_acquired)
rtnl_lock();
/* repopulate tunnel port filters */ /* repopulate tunnel port filters */
udp_tunnel_nic_reset_ntf(pf->vsi[pf->lan_vsi]->netdev); udp_tunnel_nic_reset_ntf(pf->vsi[pf->lan_vsi]->netdev);
if (!lock_acquired)
rtnl_unlock();
return ret; return ret;
} }
@ -15530,7 +15537,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pf->flags |= I40E_FLAG_VEB_MODE_ENABLED; pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
} }
#endif #endif
err = i40e_setup_pf_switch(pf, false); err = i40e_setup_pf_switch(pf, false, false);
if (err) { if (err) {
dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err); dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
goto err_vsis; goto err_vsis;