[alsa-devel] [PATCH 2/3 V2] ALSA: hda - jack poll once if jackpoll_interval==0

Wang Xingchao xingchao.wang at linux.intel.com
Fri Jul 26 05:34:45 CEST 2013

With jackpoll_interval != 0, it's used to poll jack event periodically
in a delayed work. if it's 0, give the caller chance to probe jack status
but will not restart the delayed work.

In the next patch which enable WAKEEN feature, HDA controller was able to wake
up system when it's in D3, it's useful to detect Jack hotplug event and notify
userspace. By default the jackpoll_interval=0, this patch let jack poll once
without starting the delayed work.

Signed-off-by: Wang Xingchao <xingchao.wang at linux.intel.com>
 sound/pci/hda/hda_codec.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 8a005f0..fdbb09a 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1216,11 +1216,13 @@ static void hda_jackpoll_work(struct work_struct *work)
 	struct hda_codec *codec =
 		container_of(work, struct hda_codec, jackpoll_work.work);
-	if (!codec->jackpoll_interval)
-		return;
+	if (!codec->jackpoll_interval)
+		return;
 	queue_delayed_work(codec->bus->workq, &codec->jackpoll_work,

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