forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

devres: allow adding custom actions to the stack

Browse source 
Sometimes drivers need to execute one-off actions in their error handling
or device teardown paths. An example would be toggling a GPIO line to
reset the controlled device into predefined state.

To allow performing such actions when using managed resources let's allow
adding them to stack/group of devres resources.

Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2013-02-23 13:11:14 -08:00
parent 7241443f67
commit d6b0c58048
2 changed files with 78 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/linux/device.h
View file

@ -567,6 +567,10 @@ extern void devm_kfree(struct device *dev, void *p);
void __iomem *devm_request_and_ioremap(struct device *dev,
struct resource *res);
/* allows to add/remove a custom action to devres stack */
int devm_add_action(struct device *dev, void (*action)(void *), void *data);
void devm_remove_action(struct device *dev, void (*action)(void *), void *data);
struct device_dma_parameters {
/*
* a low level driver may set these to teach IOMMU code about