linux-kernel - Re: [PATCH for-rc 3/3] RDMA/hns: Add check and adjust for function resource values

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Message-ID: <20230712125336.GE41919@unreal>
Date:   Wed, 12 Jul 2023 15:53:36 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Junxian Huang <huangjunxian6@...ilicon.com>
Cc:     jgg@...dia.com, linux-rdma@...r.kernel.org, linuxarm@...wei.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH for-rc 3/3] RDMA/hns: Add check and adjust for function
 resource values

On Wed, Jul 12, 2023 at 02:00:33PM +0800, Junxian Huang wrote:
> Currently, RoCE driver gets function resource values from firmware
> without validity check. As these resources are mostly related to memory,
> an invalid value may lead to serious consequence such as kernel panic.
> 
> This patch adds check for these resource values and adjusts the invalid
> ones.
> 
> Signed-off-by: Junxian Huang <huangjunxian6@...ilicon.com>
> ---
>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 116 ++++++++++++++++++++-
>  drivers/infiniband/hw/hns/hns_roce_hw_v2.h |  37 +++++++
>  2 files changed, 149 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
> index c4b92d8bd98a..dae0e6959fa0 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
> @@ -1650,6 +1650,98 @@ static int hns_roce_config_global_param(struct hns_roce_dev *hr_dev)
>  	return hns_roce_cmq_send(hr_dev, &desc, 1);
>  }

<...>

> +static inline bool check_res_is_supported(struct hns_roce_dev *hr_dev,
> +					  struct hns_roce_bt_num *bt_num_entry)
> +{

<...>

> +static inline void adjust_eqc_bt_num(struct hns_roce_caps *caps,
> +				     u16 *invalid_flag)
> +{

No inline functions in *.c files.

Thanks