lkml.org 
[lkml]   [2013]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC v1 3/9] gpio: davinci: use chained_irq_enter/chained_irq_exit API
On Wednesday 27 November 2013 01:10 AM, Grygorii Strashko wrote:
> It's unsafe to call IRQ chip callbacks (.irq_mask/irq_unmask/irq_ack)
> from chained IRQ handler directly. Because, Davinci GPIO block is used
> by different SoCs, which, in turn, have different Main IRQ controllers
> (Davinci - aintc, cp-intc; Keystone - arm-gic) which may introduce
> diffrent set of IRQ chip callbacks. As result, call of
> gpio_irq_handler() on Keysone will simply cause crash the system,
> because ARM-GIC implements .irq_eoi() instead of .irq_ack().
>
> Hence, fix it by using Kernel chained_irq_enter/chained_irq_exit APIs as
> they are intended to handle exact such cases.
>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>

Queued with Linus's and Santosh's acks.

Thanks,
Sekhar


\
 
 \ /
  Last update: 2013-12-15 14:41    [W:1.929 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site