On Thu, Sep 03, 2015 at 08:05:40PM +0200, Vincent Pelletier wrote: > Hi, > > On Fri, 21 Aug 2015 22:48:24 +0200, Vincent Pelletier > <plr.vincent@xxxxxxxxx> wrote: > > On Fri, 21 Aug 2015 19:52:16 +0200, Simon Guinot > > <simon.guinot@xxxxxxxxxxxx> wrote: > > > Please, could you describe a setup (as simple as possible) allowing to > > > reproduce the issue ? I'll try it on my side. > > [...] > > > Please try to make the module list needed to reproduce the issue as > > > short as possible. Ideally only gpio_f7188x would be needed. > > > > The simplest I could find so far needs gpio-input-polled with 20ms > > polling period (I didn't try to change polling period), and a shell loop > > writing to gpioXX/value. > > Have you had a chance to reproduce this issue ? > Can I do something to help ? Hi Vincent, Vincent (Donnefort) finally succeeds to reproduce the issue. The setup is quite simple. You only have to flood the gpio-f7188x driver via the sysfs GPIO interface. Nothing more is needed. After some debugging we discovered that the problem comes from the __request_region function which don't handle very well concurrent requests on a muxed region. I will send a patch as a reply to this email. Please, can you test it ? Thanks, Simon
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