From 215a64a25cd483e54d472987426d78694fc46ed0 Mon Sep 17 00:00:00 2001 From: Rasesh Mody Date: Tue, 11 Dec 2012 12:24:54 +0000 Subject: [PATCH] bna: Add RX State Change Details: - BNA state machine for Rx in start_wait state moves it to stop_wait on receipt of RX_E_STOP. In Rx stop_wait state, on receipt of RX_E_STARTED event does enet stop RX_E_STOPPED event does rx_cleanup_cbfn rx_cleanup_cbfn in this case is called without post_cbfn. post_cbfn happens only after RX_E_STARTED event is received in start_wait. Without doing post_cbfn, NAPI remains disabled and in cleanup we try to disable again causing endless wait. ifconfig process and other workers can thus get stuck. - Introducing start_stop_wait state for Rx. This state handles the case of if post_cbfn is not done simply do stop without the cleanup. Signed-off-by: Rasesh Mody Signed-off-by: David S. Miller --- drivers/net/ethernet/brocade/bna/bna_tx_rx.c | 27 +++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/brocade/bna/bna_tx_rx.c b/drivers/net/ethernet/brocade/bna/bna_tx_rx.c index 4df6d4b50b45..ea6f4a036401 100644 --- a/drivers/net/ethernet/brocade/bna/bna_tx_rx.c +++ b/drivers/net/ethernet/brocade/bna/bna_tx_rx.c @@ -1355,6 +1355,8 @@ bfa_fsm_state_decl(bna_rx, stopped, struct bna_rx, enum bna_rx_event); bfa_fsm_state_decl(bna_rx, start_wait, struct bna_rx, enum bna_rx_event); +bfa_fsm_state_decl(bna_rx, start_stop_wait, + struct bna_rx, enum bna_rx_event); bfa_fsm_state_decl(bna_rx, rxf_start_wait, struct bna_rx, enum bna_rx_event); bfa_fsm_state_decl(bna_rx, started, @@ -1432,7 +1434,7 @@ static void bna_rx_sm_start_wait(struct bna_rx *rx, { switch (event) { case RX_E_STOP: - bfa_fsm_set_state(rx, bna_rx_sm_stop_wait); + bfa_fsm_set_state(rx, bna_rx_sm_start_stop_wait); break; case RX_E_FAIL: @@ -1488,6 +1490,29 @@ bna_rx_sm_rxf_stop_wait(struct bna_rx *rx, enum bna_rx_event event) } +static void +bna_rx_sm_start_stop_wait_entry(struct bna_rx *rx) +{ +} + +static void +bna_rx_sm_start_stop_wait(struct bna_rx *rx, enum bna_rx_event event) +{ + switch (event) { + case RX_E_FAIL: + case RX_E_STOPPED: + bfa_fsm_set_state(rx, bna_rx_sm_stopped); + break; + + case RX_E_STARTED: + bna_rx_enet_stop(rx); + break; + + default: + bfa_sm_fault(event); + } +} + void bna_rx_sm_started_entry(struct bna_rx *rx) {