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isert: Fix case where we got disconnect before login character device was opened (merge r6080 from iser)

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git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x-iser@6082 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Yan Burman
2015-02-11 13:12:54 +00:00
parent b063927262
commit 7bcd0af193
1 changed files with 9 additions and 1 deletions
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10
iscsi-scst/kernel/isert-scst/isert_login.c
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@@ -367,7 +367,6 @@ wait_for_connection:
conn_dev = list_first_entry(&dev->new_conn_list, struct isert_conn_dev,
conn_list_entry);
list_move(&conn_dev->conn_list_entry, &dev->curr_conn_list);
kref_get(&conn_dev->kref);
spin_unlock(&dev->conn_lock);
res = snprintf(k_buff, sizeof(k_buff), "/dev/"ISER_CONN_DEV_PREFIX"%d",
@@ -496,6 +495,14 @@ static int isert_open(struct inode *inode, struct file *filp)
dev = container_of(inode->i_cdev, struct isert_conn_dev, cdev);
spin_lock(&isert_listen_dev.conn_lock);
if (unlikely(dev->occupied == 0)) {
spin_unlock(&isert_listen_dev.conn_lock);
res = -ENODEV; /* already closed */
goto out;
}
spin_unlock(&isert_listen_dev.conn_lock);
if (unlikely(!atomic_dec_and_test(&dev->available))) {
atomic_inc(&dev->available);
res = -EBUSY; /* already open */
@@ -504,6 +511,7 @@ static int isert_open(struct inode *inode, struct file *filp)
spin_lock(&isert_listen_dev.conn_lock);
list_del_init(&dev->conn_list_entry);
kref_get(&dev->kref);
spin_unlock(&isert_listen_dev.conn_lock);
filp->private_data = dev; /* for other methods */