diff options
| author | Zhou Jingyu <b02241@freescale.com> | 2011-04-27 12:57:12 +0800 |
|---|---|---|
| committer | Zhou Jingyu <b02241@freescale.com> | 2011-05-09 17:20:31 +0800 |
| commit | c82491bd332b756c058098a786edb2c122c61794 (patch) | |
| tree | ced5860fb4babdfa39fa0a22ecd1b50393aa24ae /drivers/mxc | |
| parent | bcbc21dc495c6a4384c8b0d7979503cba0bb4875 (diff) | |
ENGR00142638 pmic mc13xxx: make event thread freezable
make event thread freezable to avoid possible pmic access
before driver resume is done.
Signed-off-by: Zhou Jingyu <Jingyu.Zhou@freescale.com>
Diffstat (limited to 'drivers/mxc')
| -rw-r--r-- | drivers/mxc/pmic/core/pmic_common.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/mxc/pmic/core/pmic_common.c b/drivers/mxc/pmic/core/pmic_common.c index 7e53121f12b8..fd07c4d7e25d 100644 --- a/drivers/mxc/pmic/core/pmic_common.c +++ b/drivers/mxc/pmic/core/pmic_common.c @@ -1,5 +1,5 @@ /* - * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2009-2011 Freescale Semiconductor, Inc. All Rights Reserved. */ /* @@ -30,6 +30,7 @@ #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/kthread.h> +#include <linux/freezer.h> #include <linux/pmic_external.h> #include <linux/pmic_status.h> @@ -53,9 +54,17 @@ static int pmic_event_thread_func(void *v) unsigned int count = 0; unsigned int irq = (int)v; + set_freezable_with_signal(); while (1) { - wait_for_completion_interruptible( - &event_completion); + if (wait_for_completion_interruptible( + &event_completion)) { + /* possiblely wakeup by a freeze request*/ + try_to_freeze(); + /* check if irq arrives when resume*/ + if (!try_wait_for_completion( + &event_completion)) + continue; + } if (kthread_should_stop()) break; |