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path: root/drivers/hwmon/ibmaem.c
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Diffstat (limited to 'drivers/hwmon/ibmaem.c')
-rw-r--r--drivers/hwmon/ibmaem.c107
1 files changed, 42 insertions, 65 deletions
diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index c316294c48b..6a967d7dbde 100644
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -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 = {
@@ -148,8 +147,9 @@ struct aem_data {
int id;
struct aem_ipmi_data ipmi;
- /* Function to update sensors */
+ /* Function and buffer to update sensors */
void (*update)(struct aem_data *data);
+ struct aem_read_sensor_resp *rs_resp;
/*
* AEM 1.x sensors:
@@ -246,8 +246,6 @@ static void aem_bmc_gone(int iface);
static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
static void aem_remove_sensors(struct aem_data *data);
-static int aem_init_aem1(struct aem_ipmi_data *probe);
-static int aem_init_aem2(struct aem_ipmi_data *probe);
static int aem1_find_sensors(struct aem_data *data);
static int aem2_find_sensors(struct aem_data *data);
static void update_aem1_sensors(struct aem_data *data);
@@ -356,47 +354,16 @@ 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 */
+/* Read a sensor value; must be called with data->lock held */
static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
void *buf, size_t size)
{
int rs_size, res;
struct aem_read_sensor_req rs_req;
- struct aem_read_sensor_resp *rs_resp;
+ /* Use preallocated rx buffer */
+ struct aem_read_sensor_resp *rs_resp = data->rs_resp;
struct aem_ipmi_data *ipmi = &data->ipmi;
/* AEM registers are 1, 2, 4 or 8 bytes */
@@ -422,10 +389,6 @@ static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
ipmi->tx_message.data_len = sizeof(rs_req);
rs_size = sizeof(*rs_resp) + size;
- rs_resp = kzalloc(rs_size, GFP_KERNEL);
- if (!rs_resp)
- return -ENOMEM;
-
ipmi->rx_msg_data = rs_resp;
ipmi->rx_msg_len = rs_size;
@@ -468,7 +431,6 @@ static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
res = 0;
out:
- kfree(rs_resp);
return res;
}
@@ -526,11 +488,12 @@ static void aem_delete(struct aem_data *data)
{
list_del(&data->list);
aem_remove_sensors(data);
+ kfree(data->rs_resp);
hwmon_device_unregister(data->hwmon_dev);
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 +550,8 @@ 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);
@@ -602,24 +566,31 @@ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
platform_set_drvdata(data->pdev, data);
/* Set up IPMI interface */
- if (aem_init_ipmi_data(&data->ipmi, probe->interface,
- probe->bmc_device))
+ res = aem_init_ipmi_data(&data->ipmi, probe->interface,
+ probe->bmc_device);
+ if (res)
goto ipmi_err;
/* Register with hwmon */
data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
-
if (IS_ERR(data->hwmon_dev)) {
dev_err(&data->pdev->dev, "Unable to register hwmon "
"device for IPMI interface %d\n",
probe->interface);
+ res = PTR_ERR(data->hwmon_dev);
goto hwmon_reg_err;
}
data->update = update_aem1_sensors;
+ data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
+ if (!data->rs_resp) {
+ res = -ENOMEM;
+ goto alloc_resp_err;
+ }
/* Find sensors */
- if (aem1_find_sensors(data))
+ res = aem1_find_sensors(data);
+ if (res)
goto sensor_err;
/* Add to our list of AEM devices */
@@ -631,6 +602,8 @@ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
return 0;
sensor_err:
+ kfree(data->rs_resp);
+alloc_resp_err:
hwmon_device_unregister(data->hwmon_dev);
hwmon_reg_err:
ipmi_destroy_user(data->ipmi.user);
@@ -638,7 +611,7 @@ 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);
@@ -646,7 +619,7 @@ id_err:
}
/* Find and initialize all AEM1 instances */
-static int aem_init_aem1(struct aem_ipmi_data *probe)
+static void aem_init_aem1(struct aem_ipmi_data *probe)
{
int num, i, err;
@@ -657,11 +630,8 @@ static int aem_init_aem1(struct aem_ipmi_data *probe)
dev_err(probe->bmc_device,
"Error %d initializing AEM1 0x%X\n",
err, i);
- return err;
}
}
-
- return 0;
}
/* Probe functions for AEM2 devices */
@@ -720,7 +690,8 @@ 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);
@@ -735,24 +706,31 @@ static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
platform_set_drvdata(data->pdev, data);
/* Set up IPMI interface */
- if (aem_init_ipmi_data(&data->ipmi, probe->interface,
- probe->bmc_device))
+ res = aem_init_ipmi_data(&data->ipmi, probe->interface,
+ probe->bmc_device);
+ if (res)
goto ipmi_err;
/* Register with hwmon */
data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
-
if (IS_ERR(data->hwmon_dev)) {
dev_err(&data->pdev->dev, "Unable to register hwmon "
"device for IPMI interface %d\n",
probe->interface);
+ res = PTR_ERR(data->hwmon_dev);
goto hwmon_reg_err;
}
data->update = update_aem2_sensors;
+ data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
+ if (!data->rs_resp) {
+ res = -ENOMEM;
+ goto alloc_resp_err;
+ }
/* Find sensors */
- if (aem2_find_sensors(data))
+ res = aem2_find_sensors(data);
+ if (res)
goto sensor_err;
/* Add to our list of AEM devices */
@@ -764,6 +742,8 @@ static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
return 0;
sensor_err:
+ kfree(data->rs_resp);
+alloc_resp_err:
hwmon_device_unregister(data->hwmon_dev);
hwmon_reg_err:
ipmi_destroy_user(data->ipmi.user);
@@ -771,7 +751,7 @@ 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);
@@ -779,7 +759,7 @@ id_err:
}
/* Find and initialize all AEM2 instances */
-static int aem_init_aem2(struct aem_ipmi_data *probe)
+static void aem_init_aem2(struct aem_ipmi_data *probe)
{
struct aem_find_instance_resp fi_resp;
int err;
@@ -798,12 +778,9 @@ static int aem_init_aem2(struct aem_ipmi_data *probe)
dev_err(probe->bmc_device,
"Error %d initializing AEM2 0x%X\n",
err, fi_resp.module_handle);
- return err;
}
i++;
}
-
- return 0;
}
/* Probe a BMC for AEM firmware instances */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-12 02:35:54 +0000