Don't open /dev/zap/pseudo if there are no spans

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@289 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 5 insertions, 1 deletions

diff --git a/zaptel.c b/zaptel.c
index f1545b6..fe4cb6f 100755
--- a/zaptel.c
+++ b/zaptel.c
@@ -2089,7 +2089,11 @@ static int zt_specchan_release(struct inode *node, struct file *file, int unit)
 
 static struct zt_chan *zt_alloc_pseudo(void)
 {
-	struct zt_chan *pseudo = kmalloc(sizeof(struct zt_chan), GFP_KERNEL);
+	struct zt_chan *pseudo;
+	/* Don't allow /dev/zap/pseudo to open if there are no spans */
+	if (maxspans < 1)
+		return NULL;
+	pseudo = kmalloc(sizeof(struct zt_chan), GFP_KERNEL);
 	if (!pseudo)
 		return NULL;
 	memset(pseudo, 0, sizeof(struct zt_chan));