diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-10-17 17:51:12 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-10-17 17:51:12 +0200 |
| commit | ee4cd32ee8a68e22081f698602e4315fb4272853 (patch) | |
| tree | e44f309816eeb26727a23180ecede53f372705cd /drivers/hwmon/ams/ams-pmu.c | |
| parent | 0a02002268bf624a8b0eaf3b4eb5c4207bd80d8b (diff) | |
hwmon: (ams) Fix locking issues
Use a separate mutex to serialize input device creation/removal,
otheriwse we deadlock if we try to remove input device while it is
being polled. Also do not take ams_info.lock when it is not needed.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/ams/ams-pmu.c')
| -rw-r--r-- | drivers/hwmon/ams/ams-pmu.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/hwmon/ams/ams-pmu.c b/drivers/hwmon/ams/ams-pmu.c index 9463e9768f6..fb18b3d3162 100644 --- a/drivers/hwmon/ams/ams-pmu.c +++ b/drivers/hwmon/ams/ams-pmu.c @@ -149,8 +149,6 @@ int __init ams_pmu_init(struct device_node *np) const u32 *prop; int result; - mutex_lock(&ams_info.lock); - /* Set implementation stuff */ ams_info.of_node = np; ams_info.exit = ams_pmu_exit; @@ -161,10 +159,9 @@ int __init ams_pmu_init(struct device_node *np) /* Get PMU command, should be 0x4e, but we can never know */ prop = of_get_property(ams_info.of_node, "reg", NULL); - if (!prop) { - result = -ENODEV; - goto exit; - } + if (!prop) + return -ENODEV; + ams_pmu_cmd = ((*prop) >> 8) & 0xff; /* Disable interrupts */ @@ -175,7 +172,7 @@ int __init ams_pmu_init(struct device_node *np) result = ams_sensor_attach(); if (result < 0) - goto exit; + return result; /* Set default values */ ams_pmu_set_register(AMS_FF_LOW_LIMIT, 0x15); @@ -198,10 +195,5 @@ int __init ams_pmu_init(struct device_node *np) printk(KERN_INFO "ams: Found PMU based motion sensor\n"); - result = 0; - -exit: - mutex_unlock(&ams_info.lock); - - return result; + return 0; } |