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Subject[PATCH 7/8] w1: ds2760 and ds2780, use ida for id and ida_simple_get to get it.
Date
Straight forward.  As an aside, the ida_init calls are not needed as far
as I can see needed. (DEFINE_IDA does the same already).

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
---
drivers/w1/slaves/w1_ds2760.c | 48 +++++-----------------------------------
drivers/w1/slaves/w1_ds2780.c | 48 +++++-----------------------------------
2 files changed, 12 insertions(+), 84 deletions(-)
diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c
index 483d451..5754c9a 100644
--- a/drivers/w1/slaves/w1_ds2760.c
+++ b/drivers/w1/slaves/w1_ds2760.c
@@ -114,43 +114,7 @@ static struct bin_attribute w1_ds2760_bin_attr = {
.read = w1_ds2760_read_bin,
};

-static DEFINE_IDR(bat_idr);
-static DEFINE_MUTEX(bat_idr_lock);
-
-static int new_bat_id(void)
-{
- int ret;
-
- while (1) {
- int id;
-
- ret = idr_pre_get(&bat_idr, GFP_KERNEL);
- if (ret == 0)
- return -ENOMEM;
-
- mutex_lock(&bat_idr_lock);
- ret = idr_get_new(&bat_idr, NULL, &id);
- mutex_unlock(&bat_idr_lock);
-
- if (ret == 0) {
- ret = id & MAX_ID_MASK;
- break;
- } else if (ret == -EAGAIN) {
- continue;
- } else {
- break;
- }
- }
-
- return ret;
-}
-
-static void release_bat_id(int id)
-{
- mutex_lock(&bat_idr_lock);
- idr_remove(&bat_idr, id);
- mutex_unlock(&bat_idr_lock);
-}
+static DEFINE_IDA(bat_ida);

static int w1_ds2760_add_slave(struct w1_slave *sl)
{
@@ -158,7 +122,7 @@ static int w1_ds2760_add_slave(struct w1_slave *sl)
int id;
struct platform_device *pdev;

- id = new_bat_id();
+ id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
@@ -187,7 +151,7 @@ bin_attr_failed:
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
noid:
success:
return ret;
@@ -199,7 +163,7 @@ static void w1_ds2760_remove_slave(struct w1_slave *sl)
int id = pdev->id;

platform_device_unregister(pdev);
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
}

@@ -217,14 +181,14 @@ static int __init w1_ds2760_init(void)
{
printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor "
" chip - (c) 2004-2005, Szabolcs Gyurko\n");
- idr_init(&bat_idr);
+ ida_init(&bat_ida);
return w1_register_family(&w1_ds2760_family);
}

static void __exit w1_ds2760_exit(void)
{
w1_unregister_family(&w1_ds2760_family);
- idr_destroy(&bat_idr);
+ ida_destroy(&bat_ida);
}

EXPORT_SYMBOL(w1_ds2760_read);
diff --git a/drivers/w1/slaves/w1_ds2780.c b/drivers/w1/slaves/w1_ds2780.c
index 274c8f3..a134b38 100644
--- a/drivers/w1/slaves/w1_ds2780.c
+++ b/drivers/w1/slaves/w1_ds2780.c
@@ -99,43 +99,7 @@ static struct bin_attribute w1_ds2780_bin_attr = {
.read = w1_ds2780_read_bin,
};

-static DEFINE_IDR(bat_idr);
-static DEFINE_MUTEX(bat_idr_lock);
-
-static int new_bat_id(void)
-{
- int ret;
-
- while (1) {
- int id;
-
- ret = idr_pre_get(&bat_idr, GFP_KERNEL);
- if (ret == 0)
- return -ENOMEM;
-
- mutex_lock(&bat_idr_lock);
- ret = idr_get_new(&bat_idr, NULL, &id);
- mutex_unlock(&bat_idr_lock);
-
- if (ret == 0) {
- ret = id & MAX_ID_MASK;
- break;
- } else if (ret == -EAGAIN) {
- continue;
- } else {
- break;
- }
- }
-
- return ret;
-}
-
-static void release_bat_id(int id)
-{
- mutex_lock(&bat_idr_lock);
- idr_remove(&bat_idr, id);
- mutex_unlock(&bat_idr_lock);
-}
+static DEFINE_IDA(bat_ida);

static int w1_ds2780_add_slave(struct w1_slave *sl)
{
@@ -143,7 +107,7 @@ static int w1_ds2780_add_slave(struct w1_slave *sl)
int id;
struct platform_device *pdev;

- id = new_bat_id();
+ id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
@@ -172,7 +136,7 @@ bin_attr_failed:
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
noid:
return ret;
}
@@ -183,7 +147,7 @@ static void w1_ds2780_remove_slave(struct w1_slave *sl)
int id = pdev->id;

platform_device_unregister(pdev);
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
}

@@ -199,14 +163,14 @@ static struct w1_family w1_ds2780_family = {

static int __init w1_ds2780_init(void)
{
- idr_init(&bat_idr);
+ ida_init(&bat_ida);
return w1_register_family(&w1_ds2780_family);
}

static void __exit w1_ds2780_exit(void)
{
w1_unregister_family(&w1_ds2780_family);
- idr_destroy(&bat_idr);
+ ida_destroy(&bat_ida);
}

module_init(w1_ds2780_init);
--
1.7.3.4


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