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driver core: add dev_groups to all drivers 

Add the ability for the driver core to create and remove a list of
attribute groups automatically when the device is bound/unbound from a
specific driver.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Richard Gong <richard.gong@linux.intel.com>
Link: https://lore.kernel.org/r/20190731124349.4474-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
alistair/sunxi64-5.4-dsi
Dmitry Torokhov 2019-07-31 14:43:40 +02:00 committed by Greg Kroah-Hartman
parent 5f9e832c13
commit 23b6904442
2 changed files with 17 additions and 0 deletions
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14
drivers/base/dd.c
View File

@ -554,9 +554,16 @@ re_probe:
goto probe_failed;
}
if (device_add_groups(dev, drv->dev_groups)) {
dev_err(dev, "device_add_groups() failed\n");
goto dev_groups_failed;
}
if (test_remove) {
test_remove = false;
device_remove_groups(dev, drv->dev_groups);
if (dev->bus->remove)
dev->bus->remove(dev);
else if (drv->remove)
@ -584,6 +591,11 @@ re_probe:
drv->bus->name, __func__, dev_name(dev), drv->name);
goto done;
dev_groups_failed:
if (dev->bus->remove)
dev->bus->remove(dev);
else if (drv->remove)
drv->remove(dev);
probe_failed:
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
@ -1114,6 +1126,8 @@ static void __device_release_driver(struct device *dev, struct device *parent)
pm_runtime_put_sync(dev);
device_remove_groups(dev, drv->dev_groups);
if (dev->bus && dev->bus->remove)
dev->bus->remove(dev);
else if (drv->remove)

3
include/linux/device.h
View File

@ -262,6 +262,8 @@ enum probe_type {
* @resume: Called to bring a device from sleep mode.
* @groups: Default attributes that get created by the driver core
* automatically.
* @dev_groups: Additional attributes attached to device instance once the
* it is bound to the driver.
* @pm: Power management operations of the device which matched
* this driver.
* @coredump: Called when sysfs entry is written to. The device driver
@ -296,6 +298,7 @@ struct device_driver {
int (*suspend) (struct device *dev, pm_message_t state);
int (*resume) (struct device *dev);
const struct attribute_group **groups;
const struct attribute_group **dev_groups;
const struct dev_pm_ops *pm;
void (*coredump) (struct device *dev);