3 Dec
2015
3 Dec
'15
12:07 p.m.
On Thu, 03 Dec 2015 12:01:58 +0100, Mark Brown wrote:
On Thu, Dec 03, 2015 at 10:41:38AM +0100, Takashi Iwai wrote:
While reading this patch, I wondered how regmap can be used safely in an irq-disabled context. Mark, do we have any API for that?
We can use user supplied locks or spin_lock_irqsave().
I meant how to guarantee to make regmap_read() working in an already spin-locked context, typically in an irq handler? regmap_read() involves with the regcache and it may invoke kmalloc().
Takashi