[PATCH 06/16] RDMA/srpt: Fix handling of command / TMF submission failure

[Bart Van Assche <bvanassche@acm.org>]

If submitting an SRP IU to the target core fails, send the SCSI
response "BUSY" to the initiator instead of not sending any
response.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/infiniband/ulp/srpt/ib_srpt.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index 8cee8c6c6be9..4fc901d1c0c1 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -1505,7 +1505,7 @@ static void srpt_handle_cmd(struct srpt_rdma_ch *ch,
 			pr_err("0x%llx: parsing SRP descriptor table failed.\n",
 			       srp_cmd->tag);
 		}
-		goto release_ioctx;
+		goto busy;
 	}
 
 	rc = target_submit_cmd_map_sgls(cmd, ch->sess, srp_cmd->cdb,
@@ -1516,13 +1516,12 @@ static void srpt_handle_cmd(struct srpt_rdma_ch *ch,
 	if (rc != 0) {
 		pr_debug("target_submit_cmd() returned %d for tag %#llx\n", rc,
 			 srp_cmd->tag);
-		goto release_ioctx;
+		goto busy;
 	}
 	return;
 
-release_ioctx:
-	send_ioctx->state = SRPT_STATE_DONE;
-	srpt_release_cmd(cmd);
+busy:
+	target_send_busy(cmd);
 }
 
 static int srp_tmr_to_tcm(int fn)
-- 
2.20.1.495.gaa96b0ce6b-goog