diff options
author | Jacob Keller <jacob.e.keller@intel.com> | 2013-06-21 08:14:32 (GMT) |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2013-07-31 08:00:57 (GMT) |
commit | 8fecf67c7eafad28bb6725e326aef8a34ee1c045 (patch) | |
tree | 6ea4a9fad5904441ef5772154d66d93c11b410ad | |
parent | e027d1aec4bb49030646d2c186a721f94372d7f2 (diff) | |
download | linux-fsl-qoriq-8fecf67c7eafad28bb6725e326aef8a34ee1c045.tar.xz |
ixgbe: fix lockdep annotation issue for ptp's work item
This patch fixes a lockdep issue created due to ixgbe_ptp_stop always running
cancel_work_sync even if the work item had not been created properly with
INIT_WORK. This is caused because ixgbe_ptp_stop did not check to actually
ensure PTP was running first. The new implementation introduces a state in the
&adapter->state field which is used to indicate that PTP is running. (This
replaces the IXGBE_FLAG2_PTP_ENABLED field). This state will use the atomic
set_bit, test_bit, and test_and_clear_bit functions. ixgbe_ptp_stop will check
to ensure that PTP was enabled, (and if not, it will not attempt to do any
cleanup work from ixgbe_ptp_init). This resolves the lockdep annotation warning
found by Stephen Hemminger
Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
-rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe.h | 6 | ||||
-rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 8 | ||||
-rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | 12 |
3 files changed, 14 insertions, 12 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index d882278..6844f39 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -618,9 +618,8 @@ struct ixgbe_adapter { #define IXGBE_FLAG2_FDIR_REQUIRES_REINIT (u32)(1 << 7) #define IXGBE_FLAG2_RSS_FIELD_IPV4_UDP (u32)(1 << 8) #define IXGBE_FLAG2_RSS_FIELD_IPV6_UDP (u32)(1 << 9) -#define IXGBE_FLAG2_PTP_ENABLED (u32)(1 << 10) -#define IXGBE_FLAG2_PTP_PPS_ENABLED (u32)(1 << 11) -#define IXGBE_FLAG2_BRIDGE_MODE_VEB (u32)(1 << 12) +#define IXGBE_FLAG2_PTP_PPS_ENABLED (u32)(1 << 10) +#define IXGBE_FLAG2_BRIDGE_MODE_VEB (u32)(1 << 11) /* Tx fast path data */ int num_tx_queues; @@ -754,6 +753,7 @@ enum ixgbe_state_t { __IXGBE_DOWN, __IXGBE_SERVICE_SCHED, __IXGBE_IN_SFP_INIT, + __IXGBE_PTP_RUNNING, }; struct ixgbe_cb { diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 69c6a49..785eafa 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -4438,7 +4438,7 @@ void ixgbe_reset(struct ixgbe_adapter *adapter) if (hw->mac.san_mac_rar_index) hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0)); - if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) + if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) ixgbe_ptp_reset(adapter); } @@ -5766,7 +5766,7 @@ static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter) adapter->last_rx_ptp_check = jiffies; - if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) + if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) ixgbe_ptp_start_cyclecounter(adapter); e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", @@ -5812,7 +5812,7 @@ static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter) if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB) adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP; - if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) + if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) ixgbe_ptp_start_cyclecounter(adapter); e_info(drv, "NIC Link is Down\n"); @@ -6119,7 +6119,7 @@ static void ixgbe_service_task(struct work_struct *work) ixgbe_fdir_reinit_subtask(adapter); ixgbe_check_hang_subtask(adapter); - if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) { + if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) { ixgbe_ptp_overflow_check(adapter); ixgbe_ptp_rx_hang(adapter); } diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c index 331987d..5184e2a 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c @@ -885,8 +885,8 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) ixgbe_ptp_reset(adapter); - /* set the flag that PTP has been enabled */ - adapter->flags2 |= IXGBE_FLAG2_PTP_ENABLED; + /* enter the IXGBE_PTP_RUNNING state */ + set_bit(__IXGBE_PTP_RUNNING, &adapter->state); return; } @@ -899,10 +899,12 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) */ void ixgbe_ptp_stop(struct ixgbe_adapter *adapter) { - /* stop the overflow check task */ - adapter->flags2 &= ~(IXGBE_FLAG2_PTP_ENABLED | - IXGBE_FLAG2_PTP_PPS_ENABLED); + /* Leave the IXGBE_PTP_RUNNING state. */ + if (!test_and_clear_bit(__IXGBE_PTP_RUNNING, &adapter->state)) + return; + /* stop the PPS signal */ + adapter->flags2 &= ~IXGBE_FLAG2_PTP_PPS_ENABLED; ixgbe_ptp_setup_sdp(adapter); cancel_work_sync(&adapter->ptp_tx_work); |