[Sound-open-firmware] [alsa-devel] [PATCH v3 09/14] ASoC: SOF: Add firmware, loader support

[Bard liao]

> Date: Wed, 12 Dec 2018 12:23:33 +0100
> From: Takashi Iwai <tiwai at suse.de>
> To: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> Cc: alsa-devel at alsa-project.org, andriy.shevchenko at intel.com, Daniel
> 	Baluta <daniel.baluta at gmail.com>, liam.r.girdwood at linux.intel.com,
> 	vkoul at kernel.org, broonie at kernel.org, Alan Cox <alan at linux.intel.com>,
> 	sound-open-firmware at alsa-project.org
> Subject: Re: [alsa-devel] [PATCH v3 09/14] ASoC: SOF: Add firmware
> 	loader	support
> Message-ID: <s5htvjjj8ei.wl-tiwai at suse.de>
> Content-Type: text/plain; charset=US-ASCII
>
> On Tue, 11 Dec 2018 22:23:13 +0100,
> Pierre-Louis Bossart wrote:
>
>> +
>> +		snd_sof_dsp_block_write(sdev, offset,
>> +					(void *)block + sizeof(*block),
>> +					block->size);
>> +
>> +		/* next block */
>> +		block = (void *)block + sizeof(*block) + block->size;
> This may lead to an unaligned access.

Did you mean we should double check the block->size to
prevent access to an invalid address?

> Also how is the endianess guaranteed?

Did you mean we should guarantee the driver can work no
matter what kernel's endianess is?
ie. Use le32_to_cpu() to handle it?

>
>
> thanks,
>
> Takashi
>
>