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ASoC: jack: Fix race in snd_soc_jack_add_gpios

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SVN-Revision: 17071
This commit is contained in:
Lars-Peter Clausen 2009-07-31 23:58:29 +00:00
parent 930bb629e3
commit 1da701c04e
1 changed files with 43 additions and 0 deletions
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43
target/linux/generic-2.6/patches-2.6.30/780-fix-race-in-snd_soc_jack_add_gpios.patch Normal file
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@ -0,0 +1,43 @@
From d8d0421cddc6ecdec166612d914b8edbcdb96ed0 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Fri, 31 Jul 2009 20:33:31 +0200
Subject: [PATCH] ASoC: jack: Fix race in snd_soc_jack_add_gpios
The irq can fire as soon as it has been requested, thus all fields accessed
from within the irq handler must be initialized prior to requesting the irq.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
---
The patch is against alsa-kernel/master but I guess something similar should also
go into 2.6.31.
sound/soc/soc-jack.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/soc-jack.c b/sound/soc/soc-jack.c
index 4aa7d8f..1d455ab 100644
--- a/sound/soc/soc-jack.c
+++ b/sound/soc/soc-jack.c
@@ -221,6 +221,9 @@ int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
if (ret)
goto err;
+ INIT_WORK(&gpios[i].work, gpio_work);
+ gpios[i].jack = jack;
+
ret = request_irq(gpio_to_irq(gpios[i].gpio),
gpio_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
@@ -234,9 +237,6 @@ int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
gpio_export(gpios[i].gpio, false);
#endif
- INIT_WORK(&gpios[i].work, gpio_work);
- gpios[i].jack = jack;
-
/* Update initial jack status */
snd_soc_jack_gpio_detect(&gpios[i]);
}
--
1.5.6.5