Re: [PATCH v2 3/6] bus: mhi: Add MMIO region length to controller structure

[Jeffrey Hugo <quic_jhugo@quicinc.com>]

On 5/4/2021 5:37 PM, Bhaumik Bhatt wrote:
> Make controller driver specify the MMIO register region length
> for range checking of BHI or BHIe space. This can help validate
> that offsets are in acceptable memory region or not and avoid any
> boot-up issues due to BHI or BHIe memory accesses.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> ---
>   include/linux/mhi.h | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index 944aa3a..f6901db 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -293,6 +293,7 @@ struct mhi_controller_config {
>    * @mhi_dev: MHI device instance for the controller
>    * @debugfs_dentry: MHI controller debugfs directory
>    * @regs: Base address of MHI MMIO register space (required)
> + * @reg_len: Length of the MHI MMIO region (required)

I believe this should be moved so that it matches the ordering of the 
struct fields below.

With the adjustment, you can add my reviewed tag to this.

>    * @bhi: Points to base of MHI BHI register space
>    * @bhie: Points to base of MHI BHIe register space
>    * @wake_db: MHI WAKE doorbell register address
> @@ -386,6 +387,7 @@ struct mhi_controller {
>   	size_t rddm_size;
>   	size_t sbl_size;
>   	size_t seg_len;
> +	size_t reg_len;
>   	struct image_info *fbc_image;
>   	struct image_info *rddm_image;
>   	struct mhi_chan *mhi_chan;
>