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scsi: target/core: Make it possible to wait from more than one context for command completion

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This patch does not change any functionality but makes the patch that makes
TMF handling synchronous easier to read.

Cc: Nicholas Bellinger <[email protected]>
Cc: Mike Christie <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: David Disseldorp <[email protected]>
Cc: Hannes Reinecke <[email protected]>
Signed-off-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
This commit is contained in:
Bart Van Assche 2018-11-27 15:52:00 -08:00 • committed by Martin K. Petersen
commit a014c3647a
2 changed files with 11 additions and 6 deletions
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14
drivers/target/target_core_transport.c
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@ -1328,7 +1328,8 @@ void transport_init_se_cmd(
INIT_LIST_HEAD(&cmd->se_cmd_list);
INIT_LIST_HEAD(&cmd->state_list);
init_completion(&cmd->t_transport_stop_comp);
cmd->compl = NULL;
cmd->free_compl = NULL;
cmd->abrt_compl = NULL;
spin_lock_init(&cmd->t_state_lock);
INIT_WORK(&cmd->work, NULL);
kref_init(&cmd->cmd_kref);
@ -2689,7 +2690,7 @@ int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
transport_lun_remove_cmd(cmd);
}
if (aborted)
cmd->compl = &compl;
cmd->free_compl = &compl;
if (!aborted || tas)
ret = target_put_sess_cmd(cmd);
if (aborted) {
@ -2756,7 +2757,8 @@ static void target_release_cmd_kref(struct kref *kref)
{
struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref);
struct se_session *se_sess = se_cmd->se_sess;
struct completion *compl = se_cmd->compl;
struct completion *free_compl = se_cmd->free_compl;
struct completion *abrt_compl = se_cmd->abrt_compl;
unsigned long flags;
if (se_sess) {
@ -2767,8 +2769,10 @@ static void target_release_cmd_kref(struct kref *kref)
target_free_cmd_mem(se_cmd);
se_cmd->se_tfo->release_cmd(se_cmd);
if (compl)
complete(compl);
if (free_compl)
complete(free_compl);
if (abrt_compl)
complete(abrt_compl);
percpu_ref_put(&se_sess->cmd_count);
}