linux-kernel - [PATCH V2] wm8994: move dcs done irq request to the end of initialization of completion

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Message-ID: <1385088270.20782.12.camel@wangbiao>
Date:	Fri, 22 Nov 2013 10:44:30 +0800
From:	wangbiao <biao.wang@...el.com>
To:	Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.de>,
	Vinod Koul <vinod.koul@...el.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	di.zhang@...el.com, biao.wang@...el.com,
	patches@...nsource.wolfsonmicro.com
Subject: [PATCH V2] wm8994: move dcs done irq request to the end of
 initialization of completion

once code return from request_threaded_irq, irq was setup enabled by
default, but completion var dcs_done not got initialized yet, if then a
dcs done irq was raised, system will got hung as the sync mechanism is
invalid now.

so this patch move dcs done irq request to the end of initialization 
of completion.

Signed-off-by: wang, biao <biao.wang@...el.com>
Signed-off-by: Zhang, Di <di.zhang@...el.com>
---
 sound/soc/codecs/wm8994.c |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 86426a1..b9be9cb 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -4077,12 +4077,6 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
 	wm8994_request_irq(wm8994->wm8994, WM8994_IRQ_TEMP_SHUT,
 			   wm8994_temp_shut, "Thermal shutdown", codec);
 
-	ret = wm8994_request_irq(wm8994->wm8994, WM8994_IRQ_DCS_DONE,
-				 wm_hubs_dcs_done, "DC servo done",
-				 &wm8994->hubs);
-	if (ret == 0)
-		wm8994->hubs.dcs_done_irq = true;
-
 	switch (control->type) {
 	case WM8994:
 		if (wm8994->micdet_irq) {
@@ -4313,6 +4307,11 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
 	}
 
 	wm_hubs_add_analogue_routes(codec, 0, 0);
+	ret = wm8994_request_irq(wm8994->wm8994, WM8994_IRQ_DCS_DONE,
+				 wm_hubs_dcs_done, "DC servo done",
+				 &wm8994->hubs);
+	if (ret == 0)
+		wm8994->hubs.dcs_done_irq = true;
 	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
 
 	switch (control->type) {
-- 
1.7.0.4



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