[PATCH] iio: adc: meson_saradc: Fix memory allocation order

Jonathan Cameron jic23 at kernel.org
Sun Sep 8 04:33:56 PDT 2019


On Mon, 2 Sep 2019 21:40:49 +0100
Elie Roudninski <xademax at gmail.com> wrote:

> On Sun, Sep 1, 2019 at 12:29 PM Martin Blumenstingl
> <martin.blumenstingl at googlemail.com> wrote:
> >
> > On Sun, Sep 1, 2019 at 12:45 PM Remi Pommarel <repk at triplefau.lt> wrote:  
> > >
> > > meson_saradc's irq handler uses priv->regmap so make sure that it is
> > > allocated before the irq get enabled.
> > >
> > > This also fixes crash when CONFIG_DEBUG_SHIRQ is enabled, as device
> > > managed resources are freed in the inverted order they had been
> > > allocated, priv->regmap was freed before the spurious fake irq that
> > > CONFIG_DEBUG_SHIRQ adds called the handler.
> > >  
> >
> > Fixes: 3af109131b7eb8 ("iio: adc: meson-saradc: switch from polling to
> > interrupt mode")  
> > > Reported-by: Elie Roudninski <xademax at gmail.com>
> > > Signed-off-by: Remi Pommarel <repk at triplefau.lt>  
> > Reviewed-by: Martin Blumenstingl <martin.blumenstingl at googlemail.com>
> >
> > thank you for fixing this!  
> The patch fixed the kernel panic I had, i can now successfully boot my
> meson-gxl-s905x-libretech-cc boad using patched linux 5.2.11
> 
> Tested-by: Elie ROUDNINSKI <xademax at gmail.com>
Rather than rush through a quick pull request I'm going to hold this one
until after the merge window.

Applied to the fixes-togreg branch of iio.git (which is now based
on staging-next).

Thanks,

Jonathan

> 
> Elie
> >
> >
> > Martin  




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