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bnxt_en: Implement missing tx timeout reset logic.

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The reset logic calls bnxt_close_nic() and bnxt_open_nic() under rtnl_lock
from bnxt_sp_task.  BNXT_STATE_IN_SP_TASK must be cleared before calling
bnxt_close_nic() to avoid deadlock.

v2: Fixed white space error.  Thanks Dave.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2015-12-09 19:35:44 -05:00 committed by David S. Miller
parent 4cebdcec09
commit 028de140ff
1 changed files with 13 additions and 3 deletions
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16
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -5031,8 +5031,10 @@ static void bnxt_dbg_dump_states(struct bnxt *bp)
static void bnxt_reset_task(struct bnxt *bp)
{
bnxt_dbg_dump_states(bp);
if (netif_running(bp->dev))
bnxt_tx_disable(bp); /* prevent tx timout again */
if (netif_running(bp->dev)) {
bnxt_close_nic(bp, false, false);
bnxt_open_nic(bp, false, false);
}
}
static void bnxt_tx_timeout(struct net_device *dev)
@ -5111,8 +5113,16 @@ static void bnxt_sp_task(struct work_struct *work)
bnxt_hwrm_tunnel_dst_port_free(
bp, TUNNEL_DST_PORT_FREE_REQ_TUNNEL_TYPE_VXLAN);
}
if (test_and_clear_bit(BNXT_RESET_TASK_SP_EVENT, &bp->sp_event))
if (test_and_clear_bit(BNXT_RESET_TASK_SP_EVENT, &bp->sp_event)) {
/* bnxt_reset_task() calls bnxt_close_nic() which waits
* for BNXT_STATE_IN_SP_TASK to clear.
*/
clear_bit(BNXT_STATE_IN_SP_TASK, &bp->state);
rtnl_lock();
bnxt_reset_task(bp);
set_bit(BNXT_STATE_IN_SP_TASK, &bp->state);
rtnl_unlock();
}
smp_mb__before_atomic();
clear_bit(BNXT_STATE_IN_SP_TASK, &bp->state);