From: David Henningsson Date: Wed, 18 Dec 2013 09:46:04 +0000 (+0100) Subject: ALSA: hda - Explicitly keep codec powered up in hdmi_present_sense X-Git-Tag: v3.14-rc1~143^2~1^2~46 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=da4a7a3926d09c13ae052ede67feb7285e01e3f5;p=~emulex%2Finfiniband.git ALSA: hda - Explicitly keep codec powered up in hdmi_present_sense This should help us avoid the following mutex deadlock: [] mutex_lock+0x2a/0x50 [] hdmi_present_sense+0x53/0x3a0 [snd_hda_codec_hdmi] [] generic_hdmi_resume+0x5a/0x70 [snd_hda_codec_hdmi] [] hda_call_codec_resume+0xec/0x1d0 [snd_hda_codec] [] snd_hda_power_save+0x1e4/0x280 [snd_hda_codec] [] codec_exec_verb+0x5f/0x290 [snd_hda_codec] [] snd_hda_codec_read+0x5b/0x90 [snd_hda_codec] [] snd_hdmi_get_eld_size+0x1e/0x20 [snd_hda_codec_hdmi] [] snd_hdmi_get_eld+0x2c/0xd0 [snd_hda_codec_hdmi] [] hdmi_present_sense+0x9a/0x3a0 [snd_hda_codec_hdmi] [] hdmi_repoll_eld+0x34/0x50 [snd_hda_codec_hdmi] Signed-off-by: David Henningsson Signed-off-by: Takashi Iwai --- diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index f5060fc7c30..977db17db26 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1496,11 +1496,14 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll) * specification worked this way. Hence, we just ignore the data in * the unsolicited response to avoid custom WARs. */ - int present = snd_hda_pin_sense(codec, pin_nid); + int present; bool update_eld = false; bool eld_changed = false; bool ret; + snd_hda_power_up(codec); + present = snd_hda_pin_sense(codec, pin_nid); + mutex_lock(&per_pin->lock); pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE); if (pin_eld->monitor_present) @@ -1573,6 +1576,7 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll) jack->block_report = !ret; mutex_unlock(&per_pin->lock); + snd_hda_power_down(codec); return ret; }