From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Mon, 13 Feb 2012 10:35:01 +0000 (-0800)
Subject: target: Make target_release_cmd_kref release on empty list
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ffc32d5259d107a3aa1b822e22f20b69cb9ec0a5;p=mv-sheeva.git

target: Make target_release_cmd_kref release on empty list

This patch changes target_release_cmd_kref() to make TFO->release_cmd()
call when list_empty(&se_cmd->se_cmd_list) is TRUE.  This is required
for TMR_ABORT_TASK operation where the referenced tag descriptor may
have already been pulled of the session command list.

Reported-by: Roland Dreier <roland@purestorage.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index c6b8b823339..52a66710a29 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -4051,7 +4051,7 @@ static void target_release_cmd_kref(struct kref *kref)
 	spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
 	if (list_empty(&se_cmd->se_cmd_list)) {
 		spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
-		WARN_ON(1);
+		se_cmd->se_tfo->release_cmd(se_cmd);
 		return;
 	}
 	if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) {