On Fri, 08 Jan 2016 08:52:17 +0100, Yang, Libin wrote:
-----Original Message----- From: Takashi Iwai [mailto:tiwai@suse.de] Sent: Friday, January 08, 2016 3:44 PM To: Yang, Libin Cc: libin.yang@linux.intel.com; alsa-devel@alsa-project.org; Lin, Mengdong Subject: Re: [alsa-devel] [PATCH 3/4] ALSA: hda - hdmi jack created based on pcm
On Fri, 08 Jan 2016 04:15:03 +0100, Yang, Libin wrote:
@@ -2626,18 +2659,23 @@ static void hdmi_array_free(struct
hdmi_spec *spec)
static void generic_hdmi_free(struct hda_codec *codec) { struct hdmi_spec *spec = codec->spec;
- int pin_idx;
int pin_idx, pcm_idx;
if (codec_has_acomp(codec)) snd_hdac_i915_register_notifier(NULL);
for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { struct hdmi_spec_per_pin *per_pin = get_pin(spec,
pin_idx);
- cancel_delayed_work_sync(&per_pin->work); eld_proc_free(per_pin);
if (per_pin->acomp_jack)snd_device_free(codec->card, per_pin-acomp_jack);
- }
- for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++) {
if (spec->dyn_pcm_assign)snd_device_free(codec->card,spec->pcm_rec[pcm_idx].jack);elsespec->pcm_rec[pcm_idx].jack = NULL;Check whether spec->pcm_rec[pcm_idx].jack is NULL beforehand.
Do you mean: if (spec->pcm_rec[pcm_idx].jack) spec->pcm_rec[pcm_idx].jack = NULL;
Not only that. Calling snd_device_free() with NULL isn't allowed.
I see. It will be: +for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++) {
if (spec->pcm_rec[pcm_idx].jack == NULL)continue;if (spec->dyn_pcm_assign)BTW: It seems snd_device_free() will check the pointer.
Yes but with snd_BUG_ON(), i.e. with a warning. It shouldn't be called with NULL.
Takashi