linux-kernel - [PATCH] vhost/scsi: Use safe iteration in vhost_scsi_complete_cmd

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Date:   Thu,  9 Nov 2017 09:17:29 +0900
From:   Byungchul Park <byungchul.park@....com>
To:     nab@...ux-iscsi.org, mst@...hat.com, jasowang@...hat.com
Cc:     kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@....com
Subject: [PATCH] vhost/scsi: Use safe iteration in vhost_scsi_complete_cmd_work()

I am sorry for having made a mistake on it.

-----8<-----
>From ba9a0f76dffceffa4fa3aa2d9be49cdb0d9b7d4f Mon Sep 17 00:00:00 2001
From: Byungchul Park <byungchul.park@....com>
Date: Thu, 9 Nov 2017 09:00:21 +0900
Subject: [PATCH] vhost/scsi: Use safe iteration in vhost_scsi_complete_cmd_work()

The following patch changed the behavior which originally did safe
iteration. Make it safe as it was.

   12bdcbd539c6327c09da0503c674733cb2d82cb5
   vhost/scsi: Don't reinvent the wheel but use existing llist API

Signed-off-by: Byungchul Park <byungchul.park@....com>
---
 drivers/vhost/scsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 046f6d2..46539ca 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -519,7 +519,7 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
 					vs_completion_work);
 	DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ);
 	struct virtio_scsi_cmd_resp v_rsp;
-	struct vhost_scsi_cmd *cmd;
+	struct vhost_scsi_cmd *cmd, *t;
 	struct llist_node *llnode;
 	struct se_cmd *se_cmd;
 	struct iov_iter iov_iter;
@@ -527,7 +527,7 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
 
 	bitmap_zero(signal, VHOST_SCSI_MAX_VQ);
 	llnode = llist_del_all(&vs->vs_completion_list);
-	llist_for_each_entry(cmd, llnode, tvc_completion_list) {
+	llist_for_each_entry_safe(cmd, t, llnode, tvc_completion_list) {
 		se_cmd = &cmd->tvc_se_cmd;
 
 		pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__,
-- 
1.9.1