add use counts to prevent kernel panics (bug #3773)

git-svn-id: http://svn.digium.com/svn/zaptel/branches/v1-0@610 5390a7c7-147a-4af0-8ec9-7488f05a26cb

3 files changed, 14 insertions, 1 deletions

diff --git a/wcfxs.c b/wcfxs.c
index 4377298..8a21d9b 100755
--- a/wcfxs.c
+++ b/wcfxs.c
@@ -1660,7 +1660,9 @@ static int wcfxs_open(struct zt_chan *chan)
 	wc->usecount++;
 #ifndef LINUX26
 	MOD_INC_USE_COUNT;
-#endif
+#else
+	try_module_get(THIS_MODULE);
+#endif	
 	return 0;
 }
 
@@ -1678,6 +1680,8 @@ static int wcfxs_close(struct zt_chan *chan)
 	wc->usecount--;
 #ifndef LINUX26
 	MOD_DEC_USE_COUNT;
+#else
+	module_put(THIS_MODULE);
 #endif
 	for (x=0;x<wc->cards;x++)
 		wc->mod.fxs.idletxhookstate[x] = 1;
diff --git a/wct4xxp.c b/wct4xxp.c
index 104ed2e..05694ef 100755
--- a/wct4xxp.c
+++ b/wct4xxp.c
@@ -544,7 +544,10 @@ static int t4_open(struct zt_chan *chan)
 {
 #ifndef LINUX26
 	MOD_INC_USE_COUNT;
+#else
+	try_module_get(THIS_MODULE);
 #endif	
+
 	return 0;
 }
 
@@ -552,6 +555,8 @@ static int t4_close(struct zt_chan *chan)
 {
 #ifndef LINUX26
 	MOD_DEC_USE_COUNT;
+#else
+	module_put(THIS_MODULE);
 #endif
 	return 0;
 }
diff --git a/wcte11xp.c b/wcte11xp.c
index 7d5a361..1df94b5 100755
--- a/wcte11xp.c
+++ b/wcte11xp.c
@@ -226,6 +226,8 @@ static int t1xxp_open(struct zt_chan *chan)
 	wc->usecount++;
 #ifndef LINUX26	
 	MOD_INC_USE_COUNT;
+#else
+	try_module_get(THIS_MODULE);
 #endif	
 	return 0;
 }
@@ -346,6 +348,8 @@ static int t1xxp_close(struct zt_chan *chan)
 	wc->usecount--;
 #ifndef LINUX26	
 	MOD_DEC_USE_COUNT;
+#else
+	module_put(THIS_MODULE);
 #endif
 	/* If we're dead, release us now */
 	if (!wc->usecount && wc->dead)