diff options
| author | Bhaumik Bhatt <bbhatt@codeaurora.org> | 2020-09-29 23:22:09 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-02 11:33:47 +0200 |
| commit | f42dfbe8f712127031e7b9bc938a1c33cec2ff57 (patch) | |
| tree | a04eea1edfbc6479b78de779604860372bcd32ac | |
| parent | 8e3729bfa7be159d1f94d0caab9c1beff8268672 (diff) | |
bus: mhi: core: Introduce APIs to allocate and free the MHI controller
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>
| -rw-r--r-- | drivers/bus/mhi/core/init.c | 16 | ||||
| -rw-r--r-- | include/linux/mhi.h | 12 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index e2011ec46b92..f69a2f3d039d 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -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; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 0c97f4bc5fae..6b987e8cc438 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -528,6 +528,18 @@ struct mhi_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 * @config: Configuration to use for the controller |