fix demand-dialling bug with new driver

diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c
index 7c7844d7238e647de9546d83aa15ad8a4d257579..928a7207f806af13225107064536e87e549a1e17 100644 (file)
--- a/pppd/sys-linux.c
+++ b/pppd/sys-linux.c
@@ -851,13 +851,16 @@ int read_packet (unsigned char *buf)
        *buf++ = PPP_UI;
        len -= 2;
     }
-    nr = read(ppp_fd, buf, len);
-    if (new_style_driver && nr < 0 && (errno == EWOULDBLOCK || errno == EIO))
+    nr = -1;
+    if (new_style_driver) {
        nr = read(ppp_dev_fd, buf, len);
-    if (nr < 0) {
-       if (errno == EWOULDBLOCK || errno == EIO)
-           return -1;
-       fatal("read: %m(%d)", errno);
+       if (nr < 0 && errno != EWOULDBLOCK && errno != EIO)
+           error("read /dev/ppp: %m");
+    }
+    if (nr < 0 && ppp_fd >= 0) {
+       nr = read(ppp_fd, buf, len);
+       if (nr < 0 && errno != EWOULDBLOCK && errno != EIO)
+           error("read: %m");
     }
     return (new_style_driver && nr > 0)? nr+2: nr;
 }