diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-06-09 23:36:51 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-30 20:09:45 -0700 |
| commit | 01bdcde7f7ad3b2e6d5977e3fe4241885d76557d (patch) | |
| tree | 9dab8f775af688510d005c3b247237a3490b05b9 /drivers/target | |
| parent | 7f2a9059e6f1ad09e59b098f9096068c4b2288c0 (diff) | |
target: Use complete_all for se_cmd->t_transport_stop_comp
commit a95d6511303b848da45ee27b35018bb58087bdc6 upstream.
This patch fixes a bug where multiple waiters on ->t_transport_stop_comp
occurs due to a concurrent ABORT_TASK and session reset both invoking
transport_wait_for_tasks(), while waiting for the associated se_cmd
descriptor backend processing to complete.
For this case, complete_all() should be invoked in order to wake up
both waiters in core_tmr_abort_task() + transport_generic_free_cmd()
process contexts.
Cc: Thomas Glanzmann <thomas@glanzmann.de>
Cc: Charalampos Pournaris <charpour@gmail.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_transport.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 7dddabe83179..f2c5ed90d356 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -488,7 +488,7 @@ static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists) spin_unlock_irqrestore(&cmd->t_state_lock, flags); - complete(&cmd->t_transport_stop_comp); + complete_all(&cmd->t_transport_stop_comp); return 1; } @@ -617,7 +617,7 @@ void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) if (cmd->transport_state & CMD_T_ABORTED && cmd->transport_state & CMD_T_STOP) { spin_unlock_irqrestore(&cmd->t_state_lock, flags); - complete(&cmd->t_transport_stop_comp); + complete_all(&cmd->t_transport_stop_comp); return; } else if (cmd->transport_state & CMD_T_FAILED) { INIT_WORK(&cmd->work, target_complete_failure_work); @@ -1688,7 +1688,7 @@ void target_execute_cmd(struct se_cmd *cmd) cmd->se_tfo->get_task_tag(cmd)); spin_unlock_irq(&cmd->t_state_lock); - complete(&cmd->t_transport_stop_comp); + complete_all(&cmd->t_transport_stop_comp); return; } |