Re: Re: [PATCH] ALSA: intel_hdmi: Check for error num after setting mask

[Jiasheng Jiang]

On Thu, Jan 06, 2022 at 04:18:01PM +0800, Takashi Iwai wrote:
> Well, 32bit DMA mask practically never fails on x86 (and other
> architectures, IIRC).  It's fine to add a sanity check, but it's
> better to be mentioned that it never fails.

Actually, I have already found many place check the 32bit DMA mask.
For example:
snd_ad1889_create() in `sound/pci/ad1889.c`, 
snd_vortex_create() in `sound/pci/au88x0/au88x0.c`
tegra_pcm_dma_allocate() in `sound/soc/tegra/tegra_pcm.c`.
Therefore, I think there must be some reason that 32bit may fail.
So, to make the system more robust, it should be better to add the
sanity check.

Sincerely thanks,
Jiang