diff options
| -rw-r--r-- | drivers/media/rc/rc-main.c | 45 | ||||
| -rw-r--r-- | include/media/rc-core.h | 2 |
2 files changed, 28 insertions, 19 deletions
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 1042fa3..dcf20d9 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -723,12 +723,18 @@ int rc_open(struct rc_dev *rdev) return -EINVAL; mutex_lock(&rdev->lock); + if (!rdev->initialized) { + rval = -EINVAL; + goto unlock; + } + if (!rdev->users++ && rdev->open != NULL) rval = rdev->open(rdev); if (rval) rdev->users--; +unlock: mutex_unlock(&rdev->lock); return rval; @@ -874,6 +880,10 @@ static ssize_t show_protocols(struct device *device, return -EINVAL; mutex_lock(&dev->lock); + if (!dev->initialized) { + mutex_unlock(&dev->lock); + return -EINVAL; + } if (fattr->type == RC_FILTER_NORMAL) { enabled = dev->enabled_protocols; @@ -1074,6 +1084,10 @@ static ssize_t store_protocols(struct device *device, } mutex_lock(&dev->lock); + if (!dev->initialized) { + rc = -EINVAL; + goto out; + } old_protocols = *current_protocols; new_protocols = old_protocols; @@ -1154,12 +1168,17 @@ static ssize_t show_filter(struct device *device, if (!dev) return -EINVAL; + mutex_lock(&dev->lock); + if (!dev->initialized) { + mutex_unlock(&dev->lock); + return -EINVAL; + } + if (fattr->type == RC_FILTER_NORMAL) filter = &dev->scancode_filter; else filter = &dev->scancode_wakeup_filter; - mutex_lock(&dev->lock); if (fattr->mask) val = filter->mask; else @@ -1222,6 +1241,10 @@ static ssize_t store_filter(struct device *device, return -EINVAL; mutex_lock(&dev->lock); + if (!dev->initialized) { + ret = -EINVAL; + goto unlock; + } new_filter = *filter; if (fattr->mask) @@ -1419,14 +1442,6 @@ int rc_register_device(struct rc_dev *dev) dev->sysfs_groups[attr++] = &rc_dev_wakeup_protocol_attr_grp; dev->sysfs_groups[attr++] = NULL; - /* - * Take the lock here, as the device sysfs node will appear - * when device_add() is called, which may trigger an ir-keytable udev - * rule, which will in turn call show_protocols and access - * dev->enabled_protocols before it has been initialized. - */ - mutex_lock(&dev->lock); - rc = device_add(&dev->dev); if (rc) goto out_unlock; @@ -1440,13 +1455,7 @@ int rc_register_device(struct rc_dev *dev) dev->input_dev->phys = dev->input_phys; dev->input_dev->name = dev->input_name; - /* input_register_device can call ir_open, so unlock mutex here */ - mutex_unlock(&dev->lock); - rc = input_register_device(dev->input_dev); - - mutex_lock(&dev->lock); - if (rc) goto out_table; @@ -1475,10 +1484,7 @@ int rc_register_device(struct rc_dev *dev) request_module_nowait("ir-lirc-codec"); raw_init = true; } - /* calls ir_register_device so unlock mutex here*/ - mutex_unlock(&dev->lock); rc = ir_raw_event_register(dev); - mutex_lock(&dev->lock); if (rc < 0) goto out_input; } @@ -1491,6 +1497,8 @@ int rc_register_device(struct rc_dev *dev) dev->enabled_protocols = rc_type; } + mutex_lock(&dev->lock); + dev->initialized = true; mutex_unlock(&dev->lock); IR_dprintk(1, "Registered rc%u (driver: %s, remote: %s, mode %s)\n", @@ -1512,7 +1520,6 @@ out_table: out_dev: device_del(&dev->dev); out_unlock: - mutex_unlock(&dev->lock); ida_simple_remove(&rc_ida, minor); return rc; } diff --git a/include/media/rc-core.h b/include/media/rc-core.h index f649470..c41dd70 100644 --- a/include/media/rc-core.h +++ b/include/media/rc-core.h @@ -60,6 +60,7 @@ enum rc_filter_type { /** * struct rc_dev - represents a remote control device * @dev: driver model's view of this device + * @initialized: true if the device init has completed * @sysfs_groups: sysfs attribute groups * @input_name: name of the input child device * @input_phys: physical path to the input child device @@ -121,6 +122,7 @@ enum rc_filter_type { */ struct rc_dev { struct device dev; + bool initialized; const struct attribute_group *sysfs_groups[5]; const char *input_name; const char *input_phys; |
