[PATCH 1/5] tcm_vhost: Add missed lock in vhost_scsi_clear_endpoint()

[Asias He]

tv_tpg->tv_tpg_vhost_count should be protected by tv_tpg->tv_tpg_mutex.

Signed-off-by: Asias He <as...@redhat.com>
---
 drivers/vhost/tcm_vhost.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 9951297..b3e50d7 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -860,9 +860,11 @@ static int vhost_scsi_clear_endpoint(
                if (!tv_tpg)
                        continue;
 
+               mutex_lock(&tv_tpg->tv_tpg_mutex);
                tv_tport = tv_tpg->tport;
                if (!tv_tport) {
                        ret = -ENODEV;
+                       mutex_unlock(&tv_tpg->tv_tpg_mutex);
                        goto err;
                }
 
@@ -872,11 +874,13 @@ static int vhost_scsi_clear_endpoint(
                                tv_tport->tport_name, tv_tpg->tport_tpgt,
                                t->vhost_wwpn, t->vhost_tpgt);
                        ret = -EINVAL;
+                       mutex_unlock(&tv_tpg->tv_tpg_mutex);
                        goto err;
                }
                tv_tpg->tv_tpg_vhost_count--;
                vs->vs_tpg[target] = NULL;
                vs->vs_endpoint = false;
+               mutex_unlock(&tv_tpg->tv_tpg_mutex);
        }
        mutex_unlock(&vs->dev.mutex);
        return 0;
-- 
1.8.1.4

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