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Message-Id: <1311352886-4047-8-git-send-email-jic23@cam.ac.uk>
Date: Fri, 22 Jul 2011 17:41:16 +0100
From: Jonathan Cameron <jic23@....ac.uk>
To: linux-kernel@...r.kernel.org
Cc: lm-sensors@...sensors.org, rtc-linux@...glegroups.com,
osd-dev@...n-osd.org, linux-scsi@...r.kernel.org,
dri-devel@...ts.freedesktop.org, jkosina@...e.cz, naota@...sp.net,
rusty@...tcorp.com.au, paulmck@...ux.vnet.ibm.com,
namhyung@...il.com, randy.dunlap@...cle.com, tj@...nel.org,
cabarnes@...esign-llc.com, akpm@...ux-foundation.org,
airlied@...hat.com, thellstrom@...are.com, johnpol@....mipt.ru,
JBottomley@...allels.com, bhalevy@...asas.com,
bharrosh@...asas.com, a.zummo@...ertech.it,
guenter.roeck@...csson.com, khali@...ux-fr.org, airlied@...ux.ie,
Jonathan Cameron <jic23@....ac.uk>
Subject: [PATCH 7/8] w1: ds2760 and ds2780, use ida for id and ida_simple_get to get it.
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@....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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