diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/null_blk.c | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index caa61212fdb5..ae9f615382f6 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -78,7 +78,33 @@ module_param(home_node, int, S_IRUGO); MODULE_PARM_DESC(home_node, "Home node for the device"); static int queue_mode = NULL_Q_MQ; -module_param(queue_mode, int, S_IRUGO); + +static int null_param_store_val(const char *str, int *val, int min, int max) +{ + int ret, new_val; + + ret = kstrtoint(str, 10, &new_val); + if (ret) + return -EINVAL; + + if (new_val < min || new_val > max) + return -EINVAL; + + *val = new_val; + return 0; +} + +static int null_set_queue_mode(const char *str, const struct kernel_param *kp) +{ + return null_param_store_val(str, &queue_mode, NULL_Q_BIO, NULL_Q_MQ); +} + +static struct kernel_param_ops null_queue_mode_param_ops = { + .set = null_set_queue_mode, + .get = param_get_int, +}; + +device_param_cb(queue_mode, &null_queue_mode_param_ops, &queue_mode, S_IRUGO); MODULE_PARM_DESC(queue_mode, "Block interface to use (0=bio,1=rq,2=multiqueue)"); static int gb = 250; @@ -94,7 +120,19 @@ module_param(nr_devices, int, S_IRUGO); MODULE_PARM_DESC(nr_devices, "Number of devices to register"); static int irqmode = NULL_IRQ_SOFTIRQ; -module_param(irqmode, int, S_IRUGO); + +static int null_set_irqmode(const char *str, const struct kernel_param *kp) +{ + return null_param_store_val(str, &irqmode, NULL_IRQ_NONE, + NULL_IRQ_TIMER); +} + +static struct kernel_param_ops null_irqmode_param_ops = { + .set = null_set_irqmode, + .get = param_get_int, +}; + +device_param_cb(irqmode, &null_irqmode_param_ops, &irqmode, S_IRUGO); MODULE_PARM_DESC(irqmode, "IRQ completion handler. 0-none, 1-softirq, 2-timer"); static int completion_nsec = 10000; |