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igbvf: avoid reset storms due to mailbox issues

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From: Alexander Duyck <alexander.h.duyck@intel.com>

This change makes it so that reset/interrupt storms can be avoided when
there are mailbox issues.  The new behavior is to only allow the device to
trigger mailbox related resets only once every 10 seconds.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2009-12-11 22:58:14 -08:00 committed by David S. Miller
parent fef45f4ce2
commit 7227909340
2 changed files with 8 additions and 1 deletions
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1
drivers/net/igbvf/igbvf.h
View file

@ -276,6 +276,7 @@ struct igbvf_adapter {
unsigned long led_status; unsigned long led_status;
unsigned int flags; unsigned int flags;
unsigned long last_reset;
}; };
struct igbvf_info { struct igbvf_info {

8
drivers/net/igbvf/netdev.c
View file

@ -1469,6 +1469,8 @@ static void igbvf_reset(struct igbvf_adapter *adapter)
memcpy(netdev->perm_addr, adapter->hw.mac.addr, memcpy(netdev->perm_addr, adapter->hw.mac.addr,
netdev->addr_len); netdev->addr_len);
} }
adapter->last_reset = jiffies;
} }
int igbvf_up(struct igbvf_adapter *adapter) int igbvf_up(struct igbvf_adapter *adapter)
@ -1812,11 +1814,15 @@ static bool igbvf_has_link(struct igbvf_adapter *adapter)
s32 ret_val = E1000_SUCCESS; s32 ret_val = E1000_SUCCESS;
bool link_active; bool link_active;
/* If interface is down, stay link down */
if (test_bit(__IGBVF_DOWN, &adapter->state))
return false;
ret_val = hw->mac.ops.check_for_link(hw); ret_val = hw->mac.ops.check_for_link(hw);
link_active = !hw->mac.get_link_status; link_active = !hw->mac.get_link_status;
/* if check for link returns error we will need to reset */ /* if check for link returns error we will need to reset */
if (ret_val) if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
schedule_work(&adapter->reset_task); schedule_work(&adapter->reset_task);
return link_active; return link_active;