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Commit bc411b8a authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'acpi-modules' 

* acpi-modules:
  platform: introduce OF style 'modalias' support for platform bus
  ACPI: fix module autoloading for ACPI enumerated devices
  ACPI: add module autoloading support for ACPI enumerated devices
  ACPI: fix create_modalias() return value handling
parents 8341ecc9 b9f73067

drivers/acpi/scan.c

+67 −6
Original line number Diff line number Diff line
@@ -86,6 +86,9 @@ int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, 
 * Creates hid/cid(s) string needed for modalias and uevent

 * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:

 * char *modalias: "acpi:IBM0001:ACPI0001"

 * Return: 0: no _HID and no _CID

 *         -EINVAL: output error

 *         -ENOMEM: output is truncated

*/

static int create_modalias(struct acpi_device *acpi_dev, char *modalias,

			   int size)
@@ -102,8 +105,10 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, 


	list_for_each_entry(id, &acpi_dev->pnp.ids, list) {

		count = snprintf(&modalias[len], size, "%s:", id->id);

		if (count < 0 || count >= size)

			return -EINVAL;

		if (count < 0)

			return EINVAL;

		if (count >= size)

			return -ENOMEM;

		len += count;

		size -= count;

	}
@@ -112,15 +117,71 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, 
	return len;

}



/*

 * Creates uevent modalias field for ACPI enumerated devices.

 * Because the other buses does not support ACPI HIDs & CIDs.

 * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:

 * "acpi:IBM0001:ACPI0001"

 */

int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)

{

	struct acpi_device *acpi_dev;

	int len;



	acpi_dev = ACPI_COMPANION(dev);

	if (!acpi_dev)

		return -ENODEV;



	/* Fall back to bus specific way of modalias exporting */

	if (list_empty(&acpi_dev->pnp.ids))

		return -ENODEV;



	if (add_uevent_var(env, "MODALIAS="))

		return -ENOMEM;

	len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],

				sizeof(env->buf) - env->buflen);

	if (len <= 0)

		return len;

	env->buflen += len;

	return 0;

}

EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);



/*

 * Creates modalias sysfs attribute for ACPI enumerated devices.

 * Because the other buses does not support ACPI HIDs & CIDs.

 * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:

 * "acpi:IBM0001:ACPI0001"

 */

int acpi_device_modalias(struct device *dev, char *buf, int size)

{

	struct acpi_device *acpi_dev;

	int len;



	acpi_dev = ACPI_COMPANION(dev);

	if (!acpi_dev)

		return -ENODEV;



	/* Fall back to bus specific way of modalias exporting */

	if (list_empty(&acpi_dev->pnp.ids))

		return -ENODEV;



	len = create_modalias(acpi_dev, buf, size -1);

	if (len <= 0)

		return len;

	buf[len++] = '\n';

	return len;

}

EXPORT_SYMBOL_GPL(acpi_device_modalias);



static ssize_t

acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {

	struct acpi_device *acpi_dev = to_acpi_device(dev);

	int len;



	/* Device has no HID and no CID or string is >1024 */

	len = create_modalias(acpi_dev, buf, 1024);

	if (len <= 0)

		return 0;

		return len;

	buf[len++] = '\n';

	return len;

}
@@ -839,8 +900,8 @@ static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) 
		return -ENOMEM;

	len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],

			      sizeof(env->buf) - env->buflen);

	if (len >= (sizeof(env->buf) - env->buflen))

		return -ENOMEM;

	if (len <= 0)

		return len;

	env->buflen += len;

	return 0;

}

drivers/base/platform.c

+15 −1
Original line number Diff line number Diff line
@@ -677,7 +677,17 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a, 
			     char *buf)

{

	struct platform_device	*pdev = to_platform_device(dev);

	int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);

	int len;



	len = of_device_get_modalias(dev, buf, PAGE_SIZE -1);

	if (len != -ENODEV)

		return len;



	len = acpi_device_modalias(dev, buf, PAGE_SIZE -1);

	if (len != -ENODEV)

		return len;



	len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);



	return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;

}
@@ -699,6 +709,10 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) 
	if (rc != -ENODEV)

		return rc;



	rc = acpi_device_uevent_modalias(dev, env);

	if (rc != -ENODEV)

		return rc;



	add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX,

			pdev->name);

	return 0;

drivers/i2c/i2c-core.c

+11 −0
Original line number Diff line number Diff line
@@ -104,6 +104,11 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv) 
static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env)

{

	struct i2c_client	*client = to_i2c_client(dev);

	int rc;



	rc = acpi_device_uevent_modalias(dev, env);

	if (rc != -ENODEV)

		return rc;



	if (add_uevent_var(env, "MODALIAS=%s%s",

			   I2C_MODULE_PREFIX, client->name))
@@ -409,6 +414,12 @@ static ssize_t 
show_modalias(struct device *dev, struct device_attribute *attr, char *buf)

{

	struct i2c_client *client = to_i2c_client(dev);

	int len;



	len = acpi_device_modalias(dev, buf, PAGE_SIZE -1);

	if (len != -ENODEV)

		return len;



	return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name);

}

drivers/of/device.c

+3 −0
Original line number Diff line number Diff line
@@ -85,6 +85,9 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) 
	int cplen, i;

	ssize_t tsize, csize, repend;



	if ((!dev) || (!dev->of_node))

		return -ENODEV;



	/* Name & Type */

	csize = snprintf(str, len, "of:N%sT%s", dev->of_node->name,

			 dev->of_node->type);

drivers/spi/spi.c

+10 −0
Original line number Diff line number Diff line
@@ -58,6 +58,11 @@ static ssize_t 
modalias_show(struct device *dev, struct device_attribute *a, char *buf)

{

	const struct spi_device	*spi = to_spi_device(dev);

	int len;



	len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1);

	if (len != -ENODEV)

		return len;



	return sprintf(buf, "%s%s\n", SPI_MODULE_PREFIX, spi->modalias);

}
@@ -114,6 +119,11 @@ static int spi_match_device(struct device *dev, struct device_driver *drv) 
static int spi_uevent(struct device *dev, struct kobj_uevent_env *env)

{

	const struct spi_device		*spi = to_spi_device(dev);

	int rc;



	rc = acpi_device_uevent_modalias(dev, env);

	if (rc != -ENODEV)

		return rc;



	add_uevent_var(env, "MODALIAS=%s%s", SPI_MODULE_PREFIX, spi->modalias);

	return 0;