[PATCH 1/6] [v3] wifi: ath10k: cleanup CE ring initialization

[Jeff Johnson]

On 8/23/2023 10:51 PM, Dmitry Antipov wrote:
> Commit 25d0dbcbd5c7 ("ath10k: split ce initialization and allocation")
> changes 'ath10k_ce_init_src_ring()' and 'ath10k_ce_init_dest_ring()'
> so these functions can't return -ENOMEM but always returns 0. This way
> both of them may be converted to 'void', and 'ath10k_ce_init_pipe()'
> may be simplified accordingly.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Dmitry Antipov <dmantipov at yandex.ru>

Acked-by: Jeff Johnson <quic_jjohnson at quicinc.com>

> ---
> v3: split to smaller units per Jeff's suggestion
> v2: change 'ath10k_ce_alloc_rri()' to return -ENOMEM in case
> of 'dma_alloc_coherent()' failure and fix error handling in
> 'ath10k_snoc_hif_power_up()'
> ---
>   drivers/net/wireless/ath/ath10k/ce.c | 38 ++++++++--------------------
>   1 file changed, 10 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
> index c27b8204718a..ace92c636733 100644
> --- a/drivers/net/wireless/ath/ath10k/ce.c
> +++ b/drivers/net/wireless/ath/ath10k/ce.c
> @@ -1352,9 +1352,9 @@ void ath10k_ce_enable_interrupts(struct ath10k *ar)
>   }
>   EXPORT_SYMBOL(ath10k_ce_enable_interrupts);
>   
> -static int ath10k_ce_init_src_ring(struct ath10k *ar,
> -				   unsigned int ce_id,
> -				   const struct ce_attr *attr)
> +static void ath10k_ce_init_src_ring(struct ath10k *ar,
> +				    unsigned int ce_id,
> +				    const struct ce_attr *attr)
>   {
>   	struct ath10k_ce *ce = ath10k_ce_priv(ar);
>   	struct ath10k_ce_pipe *ce_state = &ce->ce_states[ce_id];
> @@ -1389,13 +1389,11 @@ static int ath10k_ce_init_src_ring(struct ath10k *ar,
>   	ath10k_dbg(ar, ATH10K_DBG_BOOT,
>   		   "boot init ce src ring id %d entries %d base_addr %pK\n",
>   		   ce_id, nentries, src_ring->base_addr_owner_space);
> -
> -	return 0;
>   }
>   
> -static int ath10k_ce_init_dest_ring(struct ath10k *ar,
> -				    unsigned int ce_id,
> -				    const struct ce_attr *attr)
> +static void ath10k_ce_init_dest_ring(struct ath10k *ar,
> +				     unsigned int ce_id,
> +				     const struct ce_attr *attr)
>   {
>   	struct ath10k_ce *ce = ath10k_ce_priv(ar);
>   	struct ath10k_ce_pipe *ce_state = &ce->ce_states[ce_id];
> @@ -1427,8 +1425,6 @@ static int ath10k_ce_init_dest_ring(struct ath10k *ar,
>   	ath10k_dbg(ar, ATH10K_DBG_BOOT,
>   		   "boot ce dest ring id %d entries %d base_addr %pK\n",
>   		   ce_id, nentries, dest_ring->base_addr_owner_space);
> -
> -	return 0;
>   }
>   
>   static int ath10k_ce_alloc_shadow_base(struct ath10k *ar,
> @@ -1662,25 +1658,11 @@ ath10k_ce_alloc_dest_ring_64(struct ath10k *ar, unsigned int ce_id,
>   int ath10k_ce_init_pipe(struct ath10k *ar, unsigned int ce_id,
>   			const struct ce_attr *attr)
>   {
> -	int ret;
> -
> -	if (attr->src_nentries) {
> -		ret = ath10k_ce_init_src_ring(ar, ce_id, attr);
> -		if (ret) {
> -			ath10k_err(ar, "Failed to initialize CE src ring for ID: %d (%d)\n",
> -				   ce_id, ret);
> -			return ret;
> -		}
> -	}
> +	if (attr->src_nentries)
> +		ath10k_ce_init_src_ring(ar, ce_id, attr);
>   
> -	if (attr->dest_nentries) {
> -		ret = ath10k_ce_init_dest_ring(ar, ce_id, attr);
> -		if (ret) {
> -			ath10k_err(ar, "Failed to initialize CE dest ring for ID: %d (%d)\n",
> -				   ce_id, ret);
> -			return ret;
> -		}
> -	}
> +	if (attr->dest_nentries)
> +		ath10k_ce_init_dest_ring(ar, ce_id, attr);
>   
>   	return 0;
>   }