lkml.org 
[lkml]   [2021]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 5/7] i2c: rcar: : use proper DMAENGINE API for termination
Hi Wolfram,

On Wed, Jun 23, 2021 at 12:01 PM Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> dmaengine_terminate_all() is deprecated in favor of explicitly saying if
> it should be sync or async. Here, we want dmaengine_terminate_sync()
> because there is no other synchronization code in the driver to handle
> an async case.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Thanks for your patch!

Is this safe? The driver is not using a threaded irq, and DMA termination
may be called from the interrupt handler.

Have you tried triggering DMA termination, with lockdep enabled?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

\
 
 \ /
  Last update: 2021-06-23 16:03    [W:0.121 / U:0.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site