Re: [PATCH v3] bus: mhi: make mhi_controller_config::event_cfg const

[Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>]

On 8/19/2022 3:02 PM, Jeff Johnson wrote:
> Currently the event_cfg pointer in struct mhi_controller_config is not
> defined as a const pointer. This prevents clients from registering a
> read-only configuration unless they use a typecast. Since the
> event_cfg should not be modified once registered, add the const
> qualifier to event_cfg. This is aligned with the definition of ch_cfg.
>
> Signed-off-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>
> ---

v3 and no changelog?

>   drivers/bus/mhi/host/pci_generic.c | 14 +++++++-------
>   include/linux/mhi.h                |  2 +-
>   2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index 841626727f6b..2470e9f82aeb 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -238,7 +238,7 @@ static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 3),
>   };
>   
> -static struct mhi_event_config modem_qcom_v1_mhi_events[] = {
> +static const struct mhi_event_config modem_qcom_v1_mhi_events[] = {
>   	/* first ring is control+data ring */
>   	MHI_EVENT_CONFIG_CTRL(0, 64),
>   	/* DIAG dedicated event ring */
> @@ -305,7 +305,7 @@ static const struct mhi_channel_config mhi_quectel_em1xx_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
>   };
>   
> -static struct mhi_event_config mhi_quectel_em1xx_events[] = {
> +static const struct mhi_event_config mhi_quectel_em1xx_events[] = {
>   	MHI_EVENT_CONFIG_CTRL(0, 128),
>   	MHI_EVENT_CONFIG_DATA(1, 128),
>   	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
> @@ -344,7 +344,7 @@ static const struct mhi_channel_config mhi_foxconn_sdx55_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
>   };
>   
> -static struct mhi_event_config mhi_foxconn_sdx55_events[] = {
> +static struct const mhi_event_config mhi_foxconn_sdx55_events[] = {
>   	MHI_EVENT_CONFIG_CTRL(0, 128),
>   	MHI_EVENT_CONFIG_DATA(1, 128),
>   	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
> @@ -391,7 +391,7 @@ static const struct mhi_channel_config mhi_mv3x_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 512, 3),
>   };
>   
> -static struct mhi_event_config mhi_mv3x_events[] = {
> +static const struct mhi_event_config mhi_mv3x_events[] = {
>   	MHI_EVENT_CONFIG_CTRL(0, 256),
>   	MHI_EVENT_CONFIG_DATA(1, 256),
>   	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
> @@ -438,7 +438,7 @@ static const struct mhi_channel_config mhi_sierra_em919x_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 512, 2),
>   };
>   
> -static struct mhi_event_config modem_sierra_em919x_mhi_events[] = {
> +static const struct mhi_event_config modem_sierra_em919x_mhi_events[] = {
>   	/* first ring is control+data and DIAG ring */
>   	MHI_EVENT_CONFIG_CTRL(0, 2048),
>   	/* Hardware channels request dedicated hardware event rings */
> @@ -472,7 +472,7 @@ static const struct mhi_channel_config mhi_telit_fn980_hw_v1_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 2),
>   };
>   
> -static struct mhi_event_config mhi_telit_fn980_hw_v1_events[] = {
> +static const struct mhi_event_config mhi_telit_fn980_hw_v1_events[] = {
>   	MHI_EVENT_CONFIG_CTRL(0, 128),
>   	MHI_EVENT_CONFIG_HW_DATA(1, 1024, 100),
>   	MHI_EVENT_CONFIG_HW_DATA(2, 2048, 101)
> @@ -511,7 +511,7 @@ static const struct mhi_channel_config mhi_telit_fn990_channels[] = {
>   	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
>   };
>   
> -static struct mhi_event_config mhi_telit_fn990_events[] = {
> +static const struct mhi_event_config mhi_telit_fn990_events[] = {
>   	MHI_EVENT_CONFIG_CTRL(0, 128),
>   	MHI_EVENT_CONFIG_DATA(1, 128),
>   	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index a5441ad33c74..ada2f18af4d6 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -281,7 +281,7 @@ struct mhi_controller_config {
>   	u32 num_channels;
>   	const struct mhi_channel_config *ch_cfg;
>   	u32 num_events;
> -	struct mhi_event_config *event_cfg;
> +	const struct mhi_event_config *event_cfg;
>   	bool use_bounce_buf;
>   	bool m2_no_db;
>   };