linux-kernel - Re: [PATCH 1/2] mux:adgs1408/1409: New driver for Analog Devices ADGS1408/1409 mux …

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 for Android: free password hash cracker in your pocket

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

Message-ID: <059d9750-8715-bc4e-185f-d52b48ad9b59@metafoo.de>
Date:   Sat, 14 Jul 2018 16:02:51 +0200
From:   Lars-Peter Clausen <lars@...afoo.de>
To:     Peter Rosin <peda@...ntia.se>,
        Mircea Caprioru <mircea.caprioru@...log.com>
Cc:     davem@...emloft.net, mchehab+samsung@...nel.org,
        akpm@...ux-foundation.org, rdunlap@...radead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mux:adgs1408/1409: New driver for Analog Devices ADGS1408/1409 mux …

On 07/14/2018 02:04 PM, Peter Rosin wrote:
[...]
>> +static int adgs140x_spi_reg_write(struct spi_device *spi,
>> +				u8 reg_addr, u8 reg_data)
>> +{
>> +	u8 tx_buf[2];
>> +
>> +	tx_buf[0] = reg_addr;
>> +	tx_buf[1] = reg_data;
>> +
>> +	return spi_write_then_read(spi, tx_buf, sizeof(tx_buf), NULL, 0);
> 
> 	return spi_write(spi, tx_buf, sizeof(tx_buf));

Be aware spi_write_then_read() can handle on stack buffers, spi_write() can't.