[lkml]   [2019]   [Jun]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 1/2] pinctrl: mediatek: Ignore interrupts that are wake only during resume
On Mon, Apr 29, 2019 at 5:55 AM Nicolas Boichat <> wrote:

> Before suspending, mtk-eint would set the interrupt mask to the
> one in wake_mask. However, some of these interrupts may not have a
> corresponding interrupt handler, or the interrupt may be disabled.
> On resume, the eint irq handler would trigger nevertheless,
> and irq/pm.c:irq_pm_check_wakeup would be called, which would
> try to call irq_disable. However, if the interrupt is not enabled
> (irqd_irq_disabled(&desc->irq_data) is true), the call does nothing,
> and the interrupt is left enabled in the eint driver.
> Especially for level-sensitive interrupts, this will lead to an
> interrupt storm on resume.
> If we detect that an interrupt is only in wake_mask, but not in
> cur_mask, we can just mask it out immediately (as mtk_eint_resume
> would do anyway at a later stage in the resume sequence, when
> restoring cur_mask).
> Fixes: bf22ff45bed ("genirq: Avoid unnecessary low level irq function calls")
> Signed-off-by: Nicolas Boichat <>

Patch applied for fixes.
Hm a late ACK made me miss this, sorry.

Linus Walleij

 \ /
  Last update: 2019-06-25 15:52    [W:0.102 / U:2.948 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site