[alsa-devel] [PATCH 1/2] sound: ad1889: Replace mdelay with usleep_range in snd_ad1889_init

[Takashi Iwai]

On Mon, 09 Apr 2018 15:03:20 +0200,
Jia-Ju Bai wrote:
> 
> snd_ad1889_init() is never called in atomic context.
> 
> The call chain ending up at snd_ad1889_init() is:
> [1] snd_ad1889_init() <- snd_ad1889_create() <- snd_ad1889_probe()
> 
> snd_ad1889_probe() is only set as ".probe" in struct pci_driver.
> This function is not called in atomic context.
> 
> Despite never getting called from atomic context, snd_ad1889_init()
> calls mdelay for busy wait.
> This is not necessary and can be replaced with usleep_range to
> avoid busy waiting.
> 
> This is found by a static analysis tool named DCNS written by myself.
> 
> Signed-off-by: Jia-Ju Bai <baijiaju1990 at gmail.com>

Since it's no urgent fix, I'll postpone to 4.18.


thanks,

Takashi