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Re: [PATCH V2] ath10k: allocate small size dma memory in ath10k_pci_diag_write_mem

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Hi Carl,

On Wed, Oct 10, 2018 at 07:34:29PM +0800, Carl Huang wrote:
> --- a/drivers/net/wireless/ath/ath10k/pci.c
> +++ b/drivers/net/wireless/ath/ath10k/pci.c
> @@ -1071,10 +1071,9 @@ int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
>  	struct ath10k_ce *ce = ath10k_ce_priv(ar);
>  	int ret = 0;
>  	u32 *buf;
> -	unsigned int completed_nbytes, orig_nbytes, remaining_bytes;
> +	unsigned int completed_nbytes, alloc_nbytes, remaining_bytes;
>  	struct ath10k_ce_pipe *ce_diag;
>  	void *data_buf = NULL;
> -	u32 ce_data;	/* Host buffer address in CE space */
>  	dma_addr_t ce_data_base = 0;
>  	int i;
>  

...

> @@ -1128,7 +1127,7 @@ int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
>  		 * Request CE to send caller-supplied data that
>  		 * was copied to bounce buffer to Target(!) address.
>  		 */
> -		ret = ath10k_ce_send_nolock(ce_diag, NULL, (u32)ce_data,
> +		ret = ath10k_ce_send_nolock(ce_diag, NULL, (u32)ce_data_base,

The (u32) cast isn't necessary, is it? ath10k_ce_send_nolock() takes a
dma_addr_t for the 3rd argument.

Incidentally, that'd probably help if you start supporting PCI devices
with >32-bit addressing.

Brian

>  					    nbytes, 0, 0);
>  		if (ret != 0)
>  			goto done;
...



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