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kernel/reboot: Add device to sys_off_handler

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If the dev is known (e.g. a devm-based sys_off_handler is used), it can
be passed to the handler's callback to have it available there.
Otherwise, cb_data might be set to the dev in most of the cases.

Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com>
Link: https://lore.kernel.org/r/20230327-tegra-pmic-reboot-v7-3-18699d5dcd76@skidata.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Benjamin Bara 2023-07-15 09:53:25 +02:00 • committed by Lee Jones
parent aa49c90894
commit db2d6038c5
2 changed files with 6 additions and 0 deletions
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3
include/linux/reboot.h
View file

@ -129,11 +129,14 @@ enum sys_off_mode {
* @cb_data: User's callback data.
* @cmd: Command string. Currently used only by the sys-off restart mode,
* NULL otherwise.
* @dev: Device of the sys-off handler. Only if known (devm_register_*),
* NULL otherwise.
*/
struct sys_off_data {
int mode;
void *cb_data;
const char *cmd;
struct device *dev;
};
struct sys_off_handler *

3
kernel/reboot.c
View file

@ -55,6 +55,7 @@ struct sys_off_handler {
enum sys_off_mode mode;
bool blocking;
void *list;
struct device *dev;
};
/*
@ -324,6 +325,7 @@ static int sys_off_notify(struct notifier_block *nb,
data.cb_data = handler->cb_data;
data.mode = mode;
data.cmd = cmd;
data.dev = handler->dev;
return handler->sys_off_cb(&data);
}
@ -511,6 +513,7 @@ int devm_register_sys_off_handler(struct device *dev,
handler = register_sys_off_handler(mode, priority, callback, cb_data);
if (IS_ERR(handler))
return PTR_ERR(handler);
handler->dev = dev;
return devm_add_action_or_reset(dev, devm_unregister_sys_off_handler,
handler);