[src/trunk]: src pad(4) must be open before corresponding audio device is ope...

[nat <nat%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f28ac2515ded
branches:  trunk
changeset: 348325:f28ac2515ded
user:      nat <nat%NetBSD.org@localhost>
date:      Sat Oct 15 07:08:06 2016 +0000

description:
pad(4) must be open before corresponding audio device is opened.

OK christos@

diffstat:

 sys/dev/pad/pad.c       |  23 ++++++++++++++++++++---
 tests/dev/audio/h_pad.c |  10 +++++-----
 2 files changed, 25 insertions(+), 8 deletions(-)

diffs (100 lines):

diff -r 744302c8607b -r f28ac2515ded sys/dev/pad/pad.c
--- a/sys/dev/pad/pad.c Sat Oct 15 06:50:13 2016 +0000
+++ b/sys/dev/pad/pad.c Sat Oct 15 07:08:06 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pad.c,v 1.25 2016/07/07 06:55:41 msaitoh Exp $ */
+/* $NetBSD: pad.c,v 1.26 2016/10/15 07:08:06 nat Exp $ */
 
 /*-
  * Copyright (c) 2007 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.25 2016/07/07 06:55:41 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.26 2016/10/15 07:08:06 nat Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -74,6 +74,7 @@
 static int     pad_detach(device_t, int);
 static void    pad_childdet(device_t, device_t);
 
+static int     pad_audio_open(void *, int);
 static int     pad_query_encoding(void *, struct audio_encoding *);
 static int     pad_set_params(void *, int, int,
                                audio_params_t *, audio_params_t *,
@@ -99,6 +100,7 @@
 static void    pad_swvol_dtor(stream_filter_t *);
 
 static const struct audio_hw_if pad_hw_if = {
+       .open = pad_audio_open,
        .query_encoding = pad_query_encoding,
        .set_params = pad_set_params,
        .start_output = pad_start_output,
@@ -341,7 +343,7 @@
 
 #define PAD_BYTES_PER_SEC (44100 * sizeof(int16_t) * 2)
 #define TIMENEXTREAD   (20 * 1000)
-#define BYTESTOSLEEP (PAD_BYTES_PER_SEC / (1000000 / TIMENEXTREAD))
+#define BYTESTOSLEEP ((PAD_BYTES_PER_SEC / (1000000 / TIMENEXTREAD)) + PAD_BLKSIZE)
 
 int
 pad_read(dev_t dev, struct uio *uio, int flags)
@@ -420,6 +422,19 @@
 }
 
 static int
+pad_audio_open(void *opaque, int flags)
+{
+       pad_softc_t *sc;
+       sc = opaque;
+
+       if (sc->sc_open == 0)
+               return EIO;
+
+       getmicrotime(&sc->sc_last);
+       return 0;
+}
+
+static int
 pad_query_encoding(void *opaque, struct audio_encoding *ae)
 {
        pad_softc_t *sc;
@@ -477,6 +492,8 @@
        sc = (pad_softc_t *)opaque;
 
        KASSERT(mutex_owned(&sc->sc_lock));
+       if (!sc->sc_open)
+               return EIO;
 
        sc->sc_intr = intr;
        sc->sc_intrarg = intrarg;
diff -r 744302c8607b -r f28ac2515ded tests/dev/audio/h_pad.c
--- a/tests/dev/audio/h_pad.c   Sat Oct 15 06:50:13 2016 +0000
+++ b/tests/dev/audio/h_pad.c   Sat Oct 15 07:08:06 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: h_pad.c,v 1.1 2010/08/04 13:15:15 pooka Exp $  */
+/*     $NetBSD: h_pad.c,v 1.2 2016/10/15 07:08:06 nat Exp $    */
 
 /*
  * Copyright (c) 2010 Antti Kantee.  All Rights Reserved.
@@ -56,14 +56,14 @@
        ssize_t n;
 
        rump_init();
+       padfd = rump_sys_open("/dev/pad0", O_RDONLY);
+       if (padfd == -1)
+               err(1, "open pad");
+
        audiofd = rump_sys_open("/dev/audio0", O_RDWR);
        if (audiofd == -1)
                err(1, "open audio");
 
-       padfd = rump_sys_open("/dev/pad0", O_RDONLY);
-       if (padfd == -1)
-               err(1, "open pad");
-
        if ((n = rump_sys_write(audiofd, musa, sizeof(musa))) != sizeof(musa))
                err(1, "write");