On Mon, 10 Oct 2022 12:36:54 +0300
Matti Vaittinen <mazziesaccount@xxxxxxxxx> wrote:
> On 10/9/22 20:38, Jonathan Cameron wrote:
> > On Thu, 6 Oct 2022 15:53:52 +0300
> > Matti Vaittinen <mazziesaccount@xxxxxxxxx> wrote:
> >
> >> Hi Claudiu,
> >>
> >> On 10/6/22 11:35, Claudiu.Beznea@xxxxxxxxxxxxx wrote:
> >>> On 03.10.2022 11:13, Matti Vaittinen wrote:
> >>>> The iio_triggered_buffer_setup_ext() and the
> >>>> devm_iio_kfifo_buffer_setup_ext() were changed by
> >>>> commit 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr")
> >>>> to silently expect that all attributes given in buffer_attrs array are
> >>>> device-attributes. This expectation was not forced by the API - and some
> >>>> drivers did register attributes created by IIO_CONST_ATTR().
> >>>>
> >>>> When using IIO_CONST_ATTRs the added attribute "wrapping" does not copy
> >>>> the pointer to stored string constant and when the sysfs file is read the
> >>>> kernel will access to invalid location.
> >>>>
> >>>> Change the function signatures to expect an array of iio_dev_attrs to
> >>>> avoid similar errors in the future.
> >>>>
> >>>> Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
> >>>
> >>> Tested-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
> >>>
> >>> on SAMA5D2
> >>>
> >>
> >> Thanks a ton for the testing! I do _really_ appreciate it :) I am now
> >> slightly more confident regarding the fix here - and a lot more
> >> confident that we do have an actual bug (as you explained in the reply
> >> to the first RFT) :)
> >
> > You analysis was sound, so I've long been convinced ;)
> >
> > Anyhow, one more coming through...
> > AD4130 v9 patch had same issue and so will also need updating with this
> > patch if it lands before yours.
> >
> > Other than that static macro being ugly (which I can't improve on!)
> > all looks good to me, but I'll let it sit a while longer. If nothing
> > else I want to rebase the fixes-togreg tree on rc1 before putting the first
> > part of this series on top of it then letting them soak in next for
> > a few days,
>
> Thanks Jonathan.
>
> Can you please ping me if you want me to rebase/rework the series? (I
> may combine this with the kx022a-series then, but naturally not all
> patches in the series need to be applied at once. Eg, fixes can be taken
> in faster, kx022a part can be iterated, iterated, iterated... ;] ).
Applied the remainder of this series. As expected need to make the changes
in patch 10 to your kx022a driver and the ad4130 ADC that also crossed with
this series.
+CC Cosmin for the ad4130. Please check the result in the
testing branch of iio.git.
Applied to the togreg branch of iio.git and pushed out initially as testing.
This is a nice hardening of the code against future mistakes.
Thanks,
Jonathan
>
> Yours
> -- Matti
>
