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drivers/hwmon/hwmon.c: convert idr to ida and use ida_simple_get()

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A straightforward looking use of idr for a device id.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tejun Heo <tj@kernel.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Acked-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jonathan Cameron 2011-10-31 17:10:27 -07:00 committed by Linus Torvalds
parent 4ca5f468cc
commit 6580704476
1 changed files with 8 additions and 39 deletions
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47
drivers/hwmon/ibmaem.c
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@ -88,8 +88,7 @@
#define AEM_MIN_POWER_INTERVAL 200
#define UJ_PER_MJ 1000L
static DEFINE_IDR(aem_idr);
static DEFINE_SPINLOCK(aem_idr_lock);
static DEFINE_IDA(aem_ida);
static struct platform_driver aem_driver = {
.driver = {
@ -356,38 +355,6 @@ static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
complete(&data->read_complete);
}
/* ID functions */
/* Obtain an id */
static int aem_idr_get(int *id)
{
int i, err;
again:
if (unlikely(!idr_pre_get(&aem_idr, GFP_KERNEL)))
return -ENOMEM;
spin_lock(&aem_idr_lock);
err = idr_get_new(&aem_idr, NULL, &i);
spin_unlock(&aem_idr_lock);
if (unlikely(err == -EAGAIN))
goto again;
else if (unlikely(err))
return err;
*id = i & MAX_ID_MASK;
return 0;
}
/* Release an object ID */
static void aem_idr_put(int id)
{
spin_lock(&aem_idr_lock);
idr_remove(&aem_idr, id);
spin_unlock(&aem_idr_lock);
}
/* Sensor support functions */
/* Read a sensor value */
@ -530,7 +497,7 @@ static void aem_delete(struct aem_data *data)
ipmi_destroy_user(data->ipmi.user);
platform_set_drvdata(data->pdev, NULL);
platform_device_unregister(data->pdev);
aem_idr_put(data->id);
ida_simple_remove(&aem_ida, data->id);
kfree(data);
}
@ -587,7 +554,8 @@ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
/* Create sub-device for this fw instance */
if (aem_idr_get(&data->id))
data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
if (data->id < 0)
goto id_err;
data->pdev = platform_device_alloc(DRVNAME, data->id);
@ -638,7 +606,7 @@ ipmi_err:
platform_set_drvdata(data->pdev, NULL);
platform_device_unregister(data->pdev);
dev_err:
aem_idr_put(data->id);
ida_simple_remove(&aem_ida, data->id);
id_err:
kfree(data);
@ -720,7 +688,8 @@ static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
/* Create sub-device for this fw instance */
if (aem_idr_get(&data->id))
data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
if (data->id < 0)
goto id_err;
data->pdev = platform_device_alloc(DRVNAME, data->id);
@ -771,7 +740,7 @@ ipmi_err:
platform_set_drvdata(data->pdev, NULL);
platform_device_unregister(data->pdev);
dev_err:
aem_idr_put(data->id);
ida_simple_remove(&aem_ida, data->id);
id_err:
kfree(data);