From 980428cecc4ca767bd9dd61fc286cd4124fd34af Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 9 Jan 2013 09:28:20 +0100 Subject: [PATCH] ALSA: hda - Clear the dropped paths properly When a DAC is reassigned from surrounds to front or ADCs are reduced due to incomplete imux, we clear the path indices but the path instances remain as is. Since the paths might be still referred through the whole path list parsing (e.g. is_active_nid()), we should clear these path instances as well. Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_generic.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c index 26e8d83..a9bf188 100644 --- a/sound/pci/hda/hda_generic.c +++ b/sound/pci/hda/hda_generic.c @@ -331,6 +331,15 @@ snd_hda_add_new_path(struct hda_codec *codec, hda_nid_t from_nid, } EXPORT_SYMBOL_HDA(snd_hda_add_new_path); +/* clear the given path as invalid so that it won't be picked up later */ +static void invalidate_nid_path(struct hda_codec *codec, int idx) +{ + struct nid_path *path = snd_hda_get_path_from_idx(codec, idx); + if (!path) + return; + memset(path, 0, sizeof(*path)); +} + /* look for an empty DAC slot */ static hda_nid_t look_for_dac(struct hda_codec *codec, hda_nid_t pin, bool is_digital) @@ -891,10 +900,12 @@ static int try_assign_dacs(struct hda_codec *codec, int num_outs, dacs[i] = look_for_dac(codec, pin, false); if (!dacs[i] && !i) { + /* try to steal the DAC of surrounds for the front */ for (j = 1; j < num_outs; j++) { if (is_reachable_path(codec, dacs[j], pin)) { dacs[0] = dacs[j]; dacs[j] = 0; + invalidate_nid_path(codec, path_idx[j]); path_idx[j] = 0; break; } @@ -2046,9 +2057,12 @@ static int check_dyn_adc_switch(struct hda_codec *codec) continue; if (n != nums) { spec->adc_nids[nums] = spec->adc_nids[n]; - for (i = 0; i < imux->num_items; i++) + for (i = 0; i < imux->num_items; i++) { + invalidate_nid_path(codec, + spec->input_paths[i][nums]); spec->input_paths[i][nums] = spec->input_paths[i][n]; + } } nums++; } -- 2.7.4