Re: [PATCH V9 1/4] dma-mapping: Rework dma_get_cache_alignment()

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> diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c
> index a1125d1..2f6ffe5 100644
> --- a/drivers/net/ethernet/broadcom/b44.c
> +++ b/drivers/net/ethernet/broadcom/b44.c
> @@ -2344,6 +2344,10 @@ static int b44_init_one(struct ssb_device *sdev,
>  	struct net_device *dev;
>  	struct b44 *bp;
>  	int err;
> +	unsigned int dma_desc_align_size = dma_get_cache_alignment(sdev->dma_dev);
> +
> +	/* Setup paramaters for syncing RX/TX DMA descriptors */
> +	dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
>  
>  	instance++;
>  
> @@ -2587,12 +2591,8 @@ static inline void b44_pci_exit(void)
>  
>  static int __init b44_init(void)
>  {
> -	unsigned int dma_desc_align_size = dma_get_cache_alignment();
>  	int err;
>  
> -	/* Setup paramaters for syncing RX/TX DMA descriptors */
> -	dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
> -

This looks wrong - you override a global variable for each probed
device.



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