linux-kernel - [ 13/62] iscsit: remove incorrect unlock in iscsit_build_sendtargets

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Message-Id: <20121019024258.089558529@linuxfoundation.org>
Date:	Thu, 18 Oct 2012 19:44:41 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Christoph Hellwig <hch@....de>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [ 13/62] iscsit: remove incorrect unlock in iscsit_build_sendtargets_resp

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

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

From: Christoph Hellwig <hch@...radead.org>

commit 904753da183566c71211d23c169a80184648c121 upstream.

Fix a potential multiple spin-unlock -> deadlock scenario during the
overflow check within iscsit_build_sendtargets_resp() as found by
sparse static checking.

Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/target/iscsi/iscsi_target.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -3196,7 +3196,6 @@ static int iscsit_build_sendtargets_resp
 		len += 1;
 
 		if ((len + payload_len) > buffer_len) {
-			spin_unlock(&tiqn->tiqn_tpg_lock);
 			end_of_buf = 1;
 			goto eob;
 		}


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