"scheduling while atomic" bug in SBC-FITPC2 watchdog

Denis Turischev
2010-04-22T16:55:20Z

sbc_fitpc2_wdt: fixed "scheduling while atomic" bug.

speenlock need to be replaced by mutex because of sleep functions
inside wdt_send_data.

Signed-off-by: Denis Turischev <denis@compulab.co.il>
---
drivers/watchdog/sbc_fitpc2_wdt.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/watchdog/sbc_fitpc2_wdt.c b/drivers/watchdog/sbc_fitpc2_wdt.c
index 226f0f2..23da5cb 100644
--- a/drivers/watchdog/sbc_fitpc2_wdt.c
+++ b/drivers/watchdog/sbc_fitpc2_wdt.c
@@ -30,7 +30,7 @@
static int nowayout = WATCHDOG_NOWAYOUT;
static unsigned int margin = 60; /* (secs) Default is 1 minute */
static unsigned long wdt_status;
-static DEFINE_SPINLOCK(wdt_lock);
+static DEFINE_MUTEX(wdt_lock);

#define WDT_IN_USE 0
#define WDT_OK_TO_CLOSE 1
@@ -53,18 +53,18 @@ static void wdt_send_data(unsigned char command, unsigned char data)

static void wdt_enable(void)
{
- spin_lock(&wdt_lock);
+ mutex_lock(&wdt_lock);
wdt_send_data(IFACE_ON_COMMAND, 1);
wdt_send_data(REBOOT_COMMAND, margin);
- spin_unlock(&wdt_lock);
+ mutex_unlock(&wdt_lock);
}

static void wdt_disable(void)
{
- spin_lock(&wdt_lock);
+ mutex_lock(&wdt_lock);
wdt_send_data(IFACE_ON_COMMAND, 0);
wdt_send_data(REBOOT_COMMAND, 0);
- spin_unlock(&wdt_lock);
+ mutex_unlock(&wdt_lock);
}

static int fitpc2_wdt_open(struct inode *inode, struct file *file)