linux-kernel - Re: [PATCH wireless-next 7/9] wifi: ath12k: Remove unnecessary (void*) conversions

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Message-ID: <5bb164e7-c147-64d1-031d-0ba20cfffa77@nfschina.com>
Date:   Fri, 15 Sep 2023 18:05:29 +0800
From:   yunchuan <yunchuan@...china.com>
To:     Jeff Johnson <quic_jjohnson@...cinc.com>, kvalo@...nel.org
Cc:     ath12k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH wireless-next 7/9] wifi: ath12k: Remove unnecessary
 (void*) conversions

On 2023/9/15 01:06, Jeff Johnson wrote:
> On 9/13/2023 9:05 PM, Wu Yunchuan wrote:
>> No need cast (void*) to (struct hal_rx_ppdu_end_user_stats *),
>> (struct ath12k_rx_desc_info *) or (struct hal_tx_msdu_ext_desc *).
>>
>> Signed-off-by: Wu Yunchuan <yunchuan@...china.com>
>> ---
>>   drivers/net/wireless/ath/ath12k/dp_mon.c | 6 ++----
>>   drivers/net/wireless/ath/ath12k/dp_rx.c  | 2 +-
>>   drivers/net/wireless/ath/ath12k/dp_tx.c  | 2 +-
>>   3 files changed, 4 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/net/wireless/ath/ath12k/dp_mon.c 
>> b/drivers/net/wireless/ath/ath12k/dp_mon.c
>> index f1e57e98bdc6..41cfe7bd865f 100644
>> --- a/drivers/net/wireless/ath/ath12k/dp_mon.c
>> +++ b/drivers/net/wireless/ath/ath12k/dp_mon.c
>> @@ -13,8 +13,7 @@
>>   static void ath12k_dp_mon_rx_handle_ofdma_info(void *rx_tlv,
>>                              struct hal_rx_user_status *rx_user_status)
>>   {
>> -    struct hal_rx_ppdu_end_user_stats *ppdu_end_user =
>> -                (struct hal_rx_ppdu_end_user_stats *)rx_tlv;
>> +    struct hal_rx_ppdu_end_user_stats *ppdu_end_user = rx_tlv;
>>         rx_user_status->ul_ofdma_user_v0_word0 =
>>           __le32_to_cpu(ppdu_end_user->usr_resp_ref);
>> @@ -26,8 +25,7 @@ static void
>>   ath12k_dp_mon_rx_populate_byte_count(void *rx_tlv, void *ppduinfo,
>>                        struct hal_rx_user_status *rx_user_status)
>>   {
>> -    struct hal_rx_ppdu_end_user_stats *ppdu_end_user =
>> -        (struct hal_rx_ppdu_end_user_stats *)rx_tlv;
>> +    struct hal_rx_ppdu_end_user_stats *ppdu_end_user = rx_tlv;
>>       u32 mpdu_ok_byte_count = 
>> __le32_to_cpu(ppdu_end_user->mpdu_ok_cnt);
>>       u32 mpdu_err_byte_count = 
>> __le32_to_cpu(ppdu_end_user->mpdu_err_cnt);
>
> for both of the above IMO the better solution is to change the 
> prototype to replace void *rx_tlv with struct 
> hal_rx_ppdu_end_user_stats *ppdu_end_user and to remove the local 
> variable
>
> further, I think you can add const to that since the TLV is only read, 
> not written
>
> this better describes that the function requires a specific flavor of 
> RX TLV rather than handling any RX TLV
>
Hi,

Sounds like a good idea, I will check other patches for this situation.
Thanks for your suggestions.

Wu Yunchuan