ALSA: hda - Make snd_hda_jack_detect_enable_callback() returning the jack object
STAC/IDT driver calls snd_hda_jack_tbl_get() again after calling
snd_hda_jack_detect_enable_callback(). For simplifying this, let's
make snd_hda_jack_detect_enable_callback() returning the pointer while
handling the error with the standard IS_ERR() & co.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c
index 7f33279..a5fe1b4 100644
--- a/sound/pci/hda/hda_jack.c
+++ b/sound/pci/hda/hda_jack.c
@@ -214,29 +214,39 @@
/**
* snd_hda_jack_detect_enable - enable the jack-detection
+ *
+ * In the case of error, the return value will be a pointer embedded with
+ * errno. Check and handle the return value appropriately with standard
+ * macros such as @IS_ERR() and @PTR_ERR().
*/
-int snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
- hda_jack_callback cb)
+struct hda_jack_tbl *
+snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
+ hda_jack_callback cb)
{
struct hda_jack_tbl *jack = snd_hda_jack_tbl_new(codec, nid);
+ int err;
+
if (!jack)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
if (jack->jack_detect)
- return 0; /* already registered */
+ return jack; /* already registered */
jack->jack_detect = 1;
if (cb)
jack->callback = cb;
if (codec->jackpoll_interval > 0)
- return 0; /* No unsol if we're polling instead */
- return snd_hda_codec_write_cache(codec, nid, 0,
+ return jack; /* No unsol if we're polling instead */
+ err = snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_UNSOLICITED_ENABLE,
AC_USRSP_EN | jack->tag);
+ if (err < 0)
+ return ERR_PTR(err);
+ return jack;
}
EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable_callback);
int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid)
{
- return snd_hda_jack_detect_enable_callback(codec, nid, NULL);
+ return PTR_ERR_OR_ZERO(snd_hda_jack_detect_enable_callback(codec, nid, NULL));
}
EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable);