@@ -4679,7 +4679,9 @@ int bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
bnxt_tx_disable(bp);
clear_bit(BNXT_STATE_OPEN, &bp->state);
- cancel_work_sync(&bp->sp_task);
+ smp_mb__after_atomic();
+ while (test_bit(BNXT_STATE_IN_SP_TASK, &bp->state))
+ msleep(20);
/* Flush rings before disabling interrupts */
bnxt_shutdown_nic(bp, irq_re_init);
@@ -5080,8 +5082,12 @@ static void bnxt_sp_task(struct work_struct *work)
struct bnxt *bp = container_of(work, struct bnxt, sp_task);
int rc;
- if (!test_bit(BNXT_STATE_OPEN, &bp->state))
+ set_bit(BNXT_STATE_IN_SP_TASK, &bp->state);
+ smp_mb__after_atomic();
+ if (!test_bit(BNXT_STATE_OPEN, &bp->state)) {
+ clear_bit(BNXT_STATE_IN_SP_TASK, &bp->state);
return;
+ }
if (test_and_clear_bit(BNXT_RX_MASK_SP_EVENT, &bp->sp_event))
bnxt_cfg_rx_mode(bp);
@@ -5107,6 +5113,9 @@ static void bnxt_sp_task(struct work_struct *work)
}
if (test_and_clear_bit(BNXT_RESET_TASK_SP_EVENT, &bp->sp_event))
bnxt_reset_task(bp);
+
+ smp_mb__before_atomic();
+ clear_bit(BNXT_STATE_IN_SP_TASK, &bp->state);
}
static int bnxt_init_board(struct pci_dev *pdev, struct net_device *dev)
@@ -927,6 +927,7 @@ struct bnxt {
unsigned long state;
#define BNXT_STATE_OPEN 0
+#define BNXT_STATE_IN_SP_TASK 1
struct bnxt_irq *irq_tbl;
u8 mac_addr[ETH_ALEN];
When implementing driver reset from tx_timeout in the next patch, bnxt_close_nic() will be called from the sp_task workqueue. Calling cancel_work() on sp_task will hang the workqueue. Instead, set a new bit BNXT_STATE_IN_SP_TASK when bnxt_sp_task() is running. bnxt_close_nic() will wait for BNXT_STATE_IN_SP_TASK to clear before proceeding. Signed-off-by: Michael Chan <mchan@broadcom.com> --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 13 +++++++++++-- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 + 2 files changed, 12 insertions(+), 2 deletions(-)