[PATCH 1/1] target: iscsi: Fix hang for aborted WRITE_PENDING commands

[Maurizio Lombardi <mlombard@redhat.com>]

When a LUN_RESET aborts a WRITE command that is in the
TRANSPORT_WRITE_PENDING state, the target core sets CMD_T_ABORTED and waits
for the frontend to finish processing.

If the initiator subsequently sends the remaining dataout PDUs,
__iscsit_check_dataout_hdr() catches the payload, stops the dataout timer
if the sequence is final and finally dumps the data.
However, the iSCSI target doesn't trigger the completion process for these
aborted commands. Because of this, the abort path hangs indefinitely in
target_put_cmd_and_wait(), leading to a deadlocked target worker thread.

Fix this by explicitly calling target_complete_cmd() when the final dataout
PDU is received for an aborted WRITE command. target_complete_cmd() detects
the CMD_T_ABORTED flag and cleanly routes the command into target_abort_work,
allowing the abort completion to successfully unblock.

Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
---
 drivers/target/iscsi/iscsi_target.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 62ada3a52210..124ff269b8e7 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1533,8 +1533,10 @@ __iscsit_check_dataout_hdr(struct iscsit_conn *conn, void *buf,
 		 */
 		if (se_cmd->transport_state & CMD_T_ABORTED) {
 			if (hdr->flags & ISCSI_FLAG_CMD_FINAL &&
-			    --cmd->outstanding_r2ts < 1)
+			    --cmd->outstanding_r2ts < 1) {
 				iscsit_stop_dataout_timer(cmd);
+				target_complete_cmd(se_cmd, SAM_STAT_TASK_ABORTED);
+			}
 
 			return iscsit_dump_data_payload(conn, payload_length, 1);
 		}
-- 
2.55.0