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| author | David Henningsson <david.henningsson@canonical.com> | 2013-12-18 09:46:04 (GMT) |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-03-12 12:25:32 (GMT) |
| commit | d4660f500752af8910258cfeb2756959882fcf38 (patch) | |
| tree | 4b4958a87fe00c507057ed0bacbf675c7f610f7b /sound | |
| parent | f6baee71572f4932c07484b6a1e58a31db2310e0 (diff) | |
| download | linux-fsl-qoriq-d4660f500752af8910258cfeb2756959882fcf38.tar.xz | |
ALSA: hda - Explicitly keep codec powered up in hdmi_present_sense
commit da4a7a3926d09c13ae052ede67feb7285e01e3f5 upstream.
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 <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_hdmi.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index aee3021..adb374b 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1431,11 +1431,14 @@ 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) @@ -1505,6 +1508,7 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll) else ret = !repoll || !pin_eld->monitor_present || pin_eld->eld_valid; mutex_unlock(&per_pin->lock); + snd_hda_power_down(codec); return ret; } |