linux-kernel - Re: [PATCH 2/3] ath10k: use dma_zalloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 24 Jan 2017 05:18:49 +0000
From:   "Valo, Kalle" <kvalo@....qualcomm.com>
To:     Joe Perches <joe@...ches.com>
CC:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "ath10k@...ts.infradead.org" <ath10k@...ts.infradead.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] ath10k: use dma_zalloc_coherent()

Joe Perches <joe@...ches.com> writes:

> On Mon, 2017-01-23 at 15:04 +0000, Srinivas Kandagatla wrote:
>> use dma_zalloc_coherent() instead of dma_alloc_coherent and memset().
> []
>> diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
> []
>> @@ -896,7 +896,7 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
>>  	 */
>>  	alloc_nbytes = min_t(unsigned int, nbytes, DIAG_TRANSFER_LIMIT);
>>  
>> -	data_buf = (unsigned char *)dma_alloc_coherent(ar->dev,
>> +	data_buf = (unsigned char *)dma_zalloc_coherent(ar->dev,
>>  						       alloc_nbytes,
>>  						       &ce_data_base,
>>  						       GFP_ATOMIC);
>
> trivia:
>
> Nicer to realign arguments and remove the unnecessary cast.
>
> Perhaps:
>
> 	data_buf = dma_zalloc_coherent(ar->dev, alloc_nbytes, &ce_data_base,
> 				       GFP_ATOMIC);

Sure, but that should be in a separate patch.

-- 
Kalle Valo