redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

bus: mhi: core: Introduce APIs to allocate and free the MHI controller

Browse source 
Client devices should use the APIs provided to allocate and free
the MHI controller structure. This will help ensure that the
structure is zero-initialized and there are no false positives
with respect to reading any values such as the serial number or
the OEM PK hash.

Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200929175218.8178-11-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bhaumik Bhatt 2020-09-29 23:22:09 +05:30 committed by Greg Kroah-Hartman
parent 8e3729bfa7
commit f42dfbe8f7
2 changed files with 28 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
drivers/bus/mhi/core/init.c
View file

@ -954,6 +954,22 @@ void mhi_unregister_controller(struct mhi_controller *mhi_cntrl)
}
EXPORT_SYMBOL_GPL(mhi_unregister_controller);
struct mhi_controller *mhi_alloc_controller(void)
{
struct mhi_controller *mhi_cntrl;
mhi_cntrl = kzalloc(sizeof(*mhi_cntrl), GFP_KERNEL);
return mhi_cntrl;
}
EXPORT_SYMBOL_GPL(mhi_alloc_controller);
void mhi_free_controller(struct mhi_controller *mhi_cntrl)
{
kfree(mhi_cntrl);
}
EXPORT_SYMBOL_GPL(mhi_free_controller);
int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
{
struct device *dev = &mhi_cntrl->mhi_dev->dev;

12
include/linux/mhi.h
View file

@ -527,6 +527,18 @@ struct mhi_driver {
#define to_mhi_driver(drv) container_of(drv, struct mhi_driver, driver)
#define to_mhi_device(dev) container_of(dev, struct mhi_device, dev)
/**
* mhi_alloc_controller - Allocate the MHI Controller structure
* Allocate the mhi_controller structure using zero initialized memory
*/
struct mhi_controller *mhi_alloc_controller(void);
/**
* mhi_free_controller - Free the MHI Controller structure
* Free the mhi_controller structure which was previously allocated
*/
void mhi_free_controller(struct mhi_controller *mhi_cntrl);
/**
* mhi_register_controller - Register MHI controller
* @mhi_cntrl: MHI controller to register