write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/tty/n_gsm.c
..
..
@@ -50,6 +50,7 @@
50
50
 #include <linux/netdevice.h>
51
51
 #include <linux/etherdevice.h>
52
52
 #include <linux/gsmmux.h>
53
+#include "tty.h"
53
54
 
54
55
 static int debug;
55
56
 module_param(debug, int, 0600);
..
..
@@ -2158,12 +2159,13 @@
2158
2159
 static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc)
2159
2160
 {
2160
2161
 	int i;
2161
-	struct gsm_dlci *dlci = gsm->dlci[0];
2162
+	struct gsm_dlci *dlci;
2162
2163
 	struct gsm_msg *txq, *ntxq;
2163
2164
 
2164
2165
 	gsm->dead = true;
2165
2166
 	mutex_lock(&gsm->mutex);
2166
2167
 
2168
+	dlci = gsm->dlci[0];
2167
2169
 	if (dlci) {
2168
2170
 		if (disc && dlci->state != DLCI_CLOSED) {
2169
2171
 			gsm_dlci_begin_close(dlci);
..
..
@@ -2177,8 +2179,10 @@
2177
2179
 
2178
2180
 	/* Free up any link layer users and finally the control channel */
2179
2181
 	for (i = NUM_DLCI - 1; i >= 0; i--)
2180
-		if (gsm->dlci[i])
2182
+		if (gsm->dlci[i]) {
2181
2183
 			gsm_dlci_release(gsm->dlci[i]);
2184
+			gsm->dlci[i] = NULL;
2185
+		}
2182
2186
 	mutex_unlock(&gsm->mutex);
2183
2187
 	/* Now wipe the queues */
2184
2188
 	tty_ldisc_flush(gsm->tty);