From 945a160794a90442329fdd6ff30f02a5c5b39481 Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Wed, 29 Sep 2021 21:04:18 -0500 Subject: [PATCH] scsi: target: Fix ordered CMD_T_SENT handling We can race where target_handle_task_attr() has put the cmd on the delayed_cmd_list. Then target_restart_delayed_cmds() has removed it and set CMD_T_SENT, but then target_execute_cmd() now clears that bit. This patch moves the clearing to before we've put the cmd on the list. Link: https://lore.kernel.org/r/20210930020422.92578-2-michael.christie@oracle.com Reviewed-by: Lee Duncan Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen --- drivers/target/target_core_transport.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 4a0055a..64e0477 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2200,6 +2200,10 @@ static bool target_handle_task_attr(struct se_cmd *cmd) if (atomic_read(&dev->dev_ordered_sync) == 0) return false; + spin_lock_irq(&cmd->t_state_lock); + cmd->transport_state &= ~CMD_T_SENT; + spin_unlock_irq(&cmd->t_state_lock); + spin_lock(&dev->delayed_cmd_lock); list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); spin_unlock(&dev->delayed_cmd_lock); @@ -2228,12 +2232,8 @@ void target_execute_cmd(struct se_cmd *cmd) if (target_write_prot_action(cmd)) return; - if (target_handle_task_attr(cmd)) { - spin_lock_irq(&cmd->t_state_lock); - cmd->transport_state &= ~CMD_T_SENT; - spin_unlock_irq(&cmd->t_state_lock); + if (target_handle_task_attr(cmd)) return; - } __target_execute_cmd(cmd, true); } -- 2.7.4