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i40evf: protect VLAN filter list 

The MAC filter list is protected by a critical task bit, and the VLAN
list should be protected as well. This prevents list corruption if the
watchdog happens to run at the same time as a VLAN filter is being added
or deleted.

Change-ID: Ia4867cebbbb046a1f38012771b288a634ca5882b
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
hifive-unleashed-5.1
Mitch Williams 2015-03-31 00:45:05 -07:00 committed by Jeff Kirsher
parent fdf0e0bfc3
commit 13acb54683
1 changed files with 22 additions and 2 deletions
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24
drivers/net/ethernet/intel/i40evf/i40evf_main.c
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@ -664,13 +664,21 @@ i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
static struct
i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
struct i40evf_vlan_filter *f;
struct i40evf_vlan_filter *f = NULL;
int count = 50;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section)) {
udelay(1);
if (--count == 0)
goto out;
}
f = i40evf_find_vlan(adapter, vlan);
if (!f) {
f = kzalloc(sizeof(*f), GFP_ATOMIC);
if (!f)
return NULL;
goto clearout;
f->vlan = vlan;
@ -680,6 +688,9 @@ i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
}
clearout:
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
out:
return f;
}
@ -691,12 +702,21 @@ i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
struct i40evf_vlan_filter *f;
int count = 50;
while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
&adapter->crit_section)) {
udelay(1);
if (--count == 0)
return;
}
f = i40evf_find_vlan(adapter, vlan);
if (f) {
f->remove = true;
adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
}
clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
}
/**