[PATCH 5.15 04/24] scsi: iscsi: Fix redundant response for ISCSI_UEVENT_GET_HOST_STATS request

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Xiang Zhang <hawkxiang.cpp@gmail.com>

[ Upstream commit 63ca02221cc5aa0731fe2b0cc28158aaa4b84982 ]

The ISCSI_UEVENT_GET_HOST_STATS request is already handled in
iscsi_get_host_stats(). This fix ensures that redundant responses are
skipped in iscsi_if_rx().

 - On success: send reply and stats from iscsi_get_host_stats()
   within if_recv_msg().

 - On error: fall through.

Signed-off-by: Xiang Zhang <hawkxiang.cpp@gmail.com>
Link: https://lore.kernel.org/r/20250107022432.65390-1-hawkxiang.cpp@gmail.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/scsi_transport_iscsi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index e044b65ee0d08..f839e8e497be3 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -4124,7 +4124,7 @@ iscsi_if_rx(struct sk_buff *skb)
 		}
 		do {
 			/*
-			 * special case for GET_STATS:
+			 * special case for GET_STATS, GET_CHAP and GET_HOST_STATS:
 			 * on success - sending reply and stats from
 			 * inside of if_recv_msg(),
 			 * on error - fall through.
@@ -4133,6 +4133,8 @@ iscsi_if_rx(struct sk_buff *skb)
 				break;
 			if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
 				break;
+			if (ev->type == ISCSI_UEVENT_GET_HOST_STATS && !err)
+				break;
 			err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
 						  ev, sizeof(*ev));
 			if (err == -EAGAIN && --retries < 0) {
-- 
2.39.5