diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h index e98b86bf0ca1..c8d0817766bf 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h @@ -362,6 +362,7 @@ enum fm10k_state_t { __FM10K_SERVICE_DISABLE, __FM10K_MBX_LOCK, __FM10K_LINK_DOWN, + __FM10K_UPDATING_STATS, }; static inline void fm10k_mbx_lock(struct fm10k_intfc *interface) diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index be0b7dea6e72..44393763fe77 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -372,6 +372,10 @@ void fm10k_update_stats(struct fm10k_intfc *interface) u64 bytes, pkts; int i; + /* ensure only one thread updates stats at a time */ + if (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state)) + return; + /* do not allow stats update via service task for next second */ interface->next_stats_update = jiffies + HZ; @@ -449,6 +453,8 @@ void fm10k_update_stats(struct fm10k_intfc *interface) /* Fill out the OS statistics structure */ net_stats->rx_errors = rx_errors; net_stats->rx_dropped = interface->stats.nodesc_drop.count; + + clear_bit(__FM10K_UPDATING_STATS, &interface->state); } /** @@ -1572,6 +1578,9 @@ void fm10k_up(struct fm10k_intfc *interface) /* configure interrupts */ hw->mac.ops.update_int_moderator(hw); + /* enable statistics capture again */ + clear_bit(__FM10K_UPDATING_STATS, &interface->state); + /* clear down bit to indicate we are ready to go */ clear_bit(__FM10K_DOWN, &interface->state); @@ -1629,6 +1638,10 @@ void fm10k_down(struct fm10k_intfc *interface) /* capture stats one last time before stopping interface */ fm10k_update_stats(interface); + /* prevent updating statistics while we're down */ + while (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state)) + usleep_range(1000, 2000); + /* Disable DMA engine for Tx/Rx */ err = hw->mac.ops.stop_hw(hw); if (err) @@ -1757,6 +1770,7 @@ static int fm10k_sw_init(struct fm10k_intfc *interface, /* Start off interface as being down */ set_bit(__FM10K_DOWN, &interface->state); + set_bit(__FM10K_UPDATING_STATS, &interface->state); return 0; }