Re: [PATCH] wcn36xx: replace dma_alloc_coherent + memset with dma_zalloc_coherent

From: Kalle Valo
Date: Fri Aug 24 2018 - 13:35:22 EST


Colin King <colin.king@xxxxxxxxxxxxx> writes:

> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> It is preferable to use dma_zalloc_coherent rather than dam_alloc_coherent
> and memset, so use it.
>
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> ---
> drivers/net/wireless/ath/wcn36xx/dxe.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
> index 06cfe8d311f3..e66ddaa39523 100644
> --- a/drivers/net/wireless/ath/wcn36xx/dxe.c
> +++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
> @@ -174,13 +174,11 @@ static int wcn36xx_dxe_init_descs(struct device *dev, struct wcn36xx_dxe_ch *wcn
> int i;
>
> size = wcn_ch->desc_num * sizeof(struct wcn36xx_dxe_desc);
> - wcn_ch->cpu_addr = dma_alloc_coherent(dev, size, &wcn_ch->dma_addr,
> - GFP_KERNEL);
> + wcn_ch->cpu_addr = dma_zalloc_coherent(dev, size, &wcn_ch->dma_addr,
> + GFP_KERNEL);
> if (!wcn_ch->cpu_addr)
> return -ENOMEM;
>
> - memset(wcn_ch->cpu_addr, 0, size);
> -
> cur_dxe = (struct wcn36xx_dxe_desc *)wcn_ch->cpu_addr;
> cur_ctl = wcn_ch->head_blk_ctl;

Hehe, I think you are the third person submitting a similar patch :)
Anyway, I just applied this few hours ago:

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=ath-next&id=d410e28f3ae476e1572b8893c646ef44fae7bbbd

--
Kalle Valo