[Qemu-devel] [PATCH] audio: fix pc speaker init

[Qemu-devel] [PATCH] audio: fix pc speaker init

[Gerd Hoffmann]

Get rid of the pcspk_state global, allow pc speaker
be added using "-device isa-pcspk".

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/audio/pcspk.c | 35 +++++++++++++++--------------------
 1 file changed, 15 insertions(+), 20 deletions(-)

diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index 908696d483..acd80eb674 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -57,7 +57,6 @@ typedef struct {
 } PCSpkState;
 
 static const char *s_spk = "pcspk";
-static PCSpkState *pcspk_state;
 
 static inline void generate_samples(PCSpkState *s)
 {
@@ -111,22 +110,6 @@ static void pcspk_callback(void *opaque, int free)
     }
 }
 
-static int pcspk_audio_init(ISABus *bus)
-{
-    PCSpkState *s = pcspk_state;
-    struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8, 0};
-
-    AUD_register_card(s_spk, &s->card);
-
-    s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as);
-    if (!s->voice) {
-        AUD_log(s_spk, "Could not open voice\n");
-        return -1;
-    }
-
-    return 0;
-}
-
 static uint64_t pcspk_io_read(void *opaque, hwaddr addr,
                               unsigned size)
 {
@@ -179,12 +162,20 @@ static void pcspk_initfn(Object *obj)
 
 static void pcspk_realizefn(DeviceState *dev, Error **errp)
 {
+    struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8, 0};
     ISADevice *isadev = ISA_DEVICE(dev);
     PCSpkState *s = PC_SPEAKER(dev);
 
     isa_register_ioport(isadev, &s->ioport, s->iobase);
 
-    pcspk_state = s;
+    AUD_register_card(s_spk, &s->card);
+
+    s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as);
+    if (!s->voice) {
+        error_setg (errp, "Initializing audio voice failed");
+        AUD_remove_card (&s->card);
+        return;
+    }
 }
 
 static bool migrate_needed(void *opaque)
@@ -221,8 +212,6 @@ static void pcspk_class_initfn(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
     dc->vmsd = &vmstate_spk;
     dc->props = pcspk_properties;
-    /* Reason: realize sets global pcspk_state */
-    dc->user_creatable = false;
 }
 
 static const TypeInfo pcspk_info = {
@@ -233,6 +222,12 @@ static const TypeInfo pcspk_info = {
     .class_init     = pcspk_class_initfn,
 };
 
+static int pcspk_audio_init(ISABus *bus)
+{
+    isa_create_simple (bus, TYPE_PC_SPEAKER);
+    return 0;
+}
+
 static void pcspk_register(void)
 {
     type_register_static(&pcspk_info);
-- 
2.9.3

Re: [Qemu-devel] [PATCH] audio: fix pc speaker init

[no-reply]

Patchew URL: https://patchew.org/QEMU/20190118122210.505-1-kraxel@redhat.com/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Message-id: 20190118122210.505-1-kraxel@redhat.com
Type: series
Subject: [Qemu-devel] [PATCH] audio: fix pc speaker init

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
Switched to a new branch 'test'
a762b28 audio: fix pc speaker init

=== OUTPUT BEGIN ===
ERROR: space prohibited between function name and open parenthesis '('
#63: FILE: hw/audio/pcspk.c:175:
+        error_setg (errp, "Initializing audio voice failed");

ERROR: space prohibited between function name and open parenthesis '('
#85: FILE: hw/audio/pcspk.c:227:
+    isa_create_simple (bus, TYPE_PC_SPEAKER);

total: 2 errors, 0 warnings, 70 lines checked

Commit a762b288e328 (audio: fix pc speaker init) has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/20190118122210.505-1-kraxel@redhat.com/testing.checkpatch/?type=message.
---
Email generated automatically by Patchew [http://patchew.org/].
Please send your feedback to patchew-devel@redhat.com

Re: [Qemu-devel] [PATCH] audio: fix pc speaker init

[Philippe Mathieu-Daudé]

Hi Gerd,

On 1/18/19 1:22 PM, Gerd Hoffmann wrote:
> Get rid of the pcspk_state global, allow pc speaker
> be added using "-device isa-pcspk".
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  hw/audio/pcspk.c | 35 +++++++++++++++--------------------
>  1 file changed, 15 insertions(+), 20 deletions(-)
> 
> diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
> index 908696d483..acd80eb674 100644
> --- a/hw/audio/pcspk.c
> +++ b/hw/audio/pcspk.c
> @@ -57,7 +57,6 @@ typedef struct {
>  } PCSpkState;
>  
>  static const char *s_spk = "pcspk";
> -static PCSpkState *pcspk_state;

Yeah \o/

>  
>  static inline void generate_samples(PCSpkState *s)
>  {
> @@ -111,22 +110,6 @@ static void pcspk_callback(void *opaque, int free)
>      }
>  }
>  
> -static int pcspk_audio_init(ISABus *bus)
> -{
> -    PCSpkState *s = pcspk_state;
> -    struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8, 0};
> -
> -    AUD_register_card(s_spk, &s->card);
> -
> -    s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as);
> -    if (!s->voice) {
> -        AUD_log(s_spk, "Could not open voice\n");

Too bad you fixed this message, it was funny :)

> -        return -1;
> -    }
> -
> -    return 0;
> -}
> -
>  static uint64_t pcspk_io_read(void *opaque, hwaddr addr,
>                                unsigned size)
>  {
> @@ -179,12 +162,20 @@ static void pcspk_initfn(Object *obj)
>  
>  static void pcspk_realizefn(DeviceState *dev, Error **errp)
>  {
> +    struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8, 0};
>      ISADevice *isadev = ISA_DEVICE(dev);
>      PCSpkState *s = PC_SPEAKER(dev);
>  
>      isa_register_ioport(isadev, &s->ioport, s->iobase);
>  
> -    pcspk_state = s;
> +    AUD_register_card(s_spk, &s->card);
> +
> +    s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as);
> +    if (!s->voice) {
> +        error_setg (errp, "Initializing audio voice failed");
> +        AUD_remove_card (&s->card);
> +        return;
> +    }
>  }
>  
>  static bool migrate_needed(void *opaque)
> @@ -221,8 +212,6 @@ static void pcspk_class_initfn(ObjectClass *klass, void *data)
>      set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
>      dc->vmsd = &vmstate_spk;
>      dc->props = pcspk_properties;
> -    /* Reason: realize sets global pcspk_state */
> -    dc->user_creatable = false;
>  }
>  
>  static const TypeInfo pcspk_info = {
> @@ -233,6 +222,12 @@ static const TypeInfo pcspk_info = {
>      .class_init     = pcspk_class_initfn,
>  };
>  
> +static int pcspk_audio_init(ISABus *bus)
> +{
> +    isa_create_simple (bus, TYPE_PC_SPEAKER);
> +    return 0;

Previously we had soundhw_init() calling pcspk_audio_init() and ignore
failures. Now since you use isa_create_simple() which calls
qdev_init_nofail(), failure will directly exit(1).
Is it the expected behavior?

If not, we can keep the current behavior using:

       if (isa_try_create(bus, TYPE_PC_SPEAKER) == NULL) {
           return -1;
       }
       return 0;

Regards,

Phil.

> +}
> +
>  static void pcspk_register(void)
>  {
>      type_register_static(&pcspk_info);
> 

Re: [Qemu-devel] [PATCH] audio: fix pc speaker init

[Gerd Hoffmann]

> > +static int pcspk_audio_init(ISABus *bus)
> > +{
> > +    isa_create_simple (bus, TYPE_PC_SPEAKER);
> > +    return 0;
> 
> Previously we had soundhw_init() calling pcspk_audio_init() and ignore
> failures. Now since you use isa_create_simple() which calls
> qdev_init_nofail(), failure will directly exit(1).
> Is it the expected behavior?

The change wasn't intentional, but I think it is better to throw an
error instead of silently ignoring the problem.

In practice it probably doesn't make much of a difference, there isn't
much why isa_create_simple could fail ...

cheers,
  Gerd