Be sure we hold channel lock in write before talking to PRI channel

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3241 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 919a9ab1957ca5af1fbf10617649f8029185a633..26fbb67d80562e8654af07987f21370c99639faa 100755 (executable)
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -3994,7 +3994,6 @@ static int zt_write(struct ast_channel *ast, struct ast_frame *frame)
        int res;
        unsigned char outbuf[4096];
        int index;
-       
        index = zt_get_index(ast, p, 0);
        if (index < 0) {
                ast_log(LOG_WARNING, "%s doesn't really exist?\n", ast->name);
@@ -4002,6 +4001,7 @@ static int zt_write(struct ast_channel *ast, struct ast_frame *frame)
        }
 
 #ifdef ZAPATA_PRI
+       ast_mutex_lock(&p->lock);
        if (!p->proceeding && p->sig==SIG_PRI && p->pri && !p->outgoing) {
                if (p->pri->pri) {              
                        if (!pri_grab(p, p->pri)) {
@@ -4012,6 +4012,7 @@ static int zt_write(struct ast_channel *ast, struct ast_frame *frame)
                }
                p->proceeding=1;
        }
+       ast_mutex_unlock(&p->lock);
 #endif
        /* Write a frame of (presumably voice) data */
        if (frame->frametype != AST_FRAME_VOICE) {