Re: [PATCH 0/3] gpiolib: generalize GPIO line names property

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Tue, Sep 15, 2020 at 02:01:56PM +0200, Anders Roxell wrote:
> On Tue, 8 Sep 2020 at 18:40, Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> >
> > From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
> >
> > I initially sent this as part of the gpio-mockup overhaul but since
> > these patches are indepentent and the work on gpio-mockup may become
> > more complicated - I'm sending these separately.
> >
> > The only change is adding additional property helpers to count strings
> > in array.
> >
> > Bartosz Golaszewski (3):
> >   device: property: add helpers to count items in string arrays
> >   gpiolib: generalize devprop_gpiochip_set_names() for device properties
> >   gpiolib: unexport devprop_gpiochip_set_names()

Ha-ha, OF unittest is of_node centric. definitely there is no backed device.

Bart, it seems we are stuck with fwnode interface.

> [ 6186.379069][    T1]  device_property_read_string_array+0x40/0xa0
> [ 6186.381741][    T1]  devprop_gpiochip_set_names.isra.0+0x4c/0x200
> [ 6186.384394][    T1]  gpiochip_add_data_with_key+0x75c/0xf80
> [ 6186.386876][    T1]  unittest_gpio_probe+0xf4/0x1e0

> [ 6186.433241][    T1] Unable to handle kernel read from unreadable
> memory at virtual address 0000000000000570
> [ 6186.437207][    T1] Mem abort info:
> [ 6186.438639][    T1]   ESR = 0x96000004
> [ 6186.440536][    T1]   EC = 0x25: DABT (current EL), IL = 32 bits
> [ 6186.442791][    T1]   SET = 0, FnV = 0
> [ 6186.444660][    T1]   EA = 0, S1PTW = 0
> [ 6186.446233][    T1] Data abort info:
> [ 6186.447938][    T1]   ISV = 0, ISS = 0x00000004
> [ 6186.449749][    T1]   CM = 0, WnR = 0
> [ 6186.451222][    T1] [0000000000000570] user address but active_mm is swapper
> [ 6186.454000][    T1] Internal error: Oops: 96000004 [#1] PREEMPT SMP
> [ 6186.456422][    T1] Modules linked in:
> [ 6186.458232][    T1] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G    B
> W         5.9.0-rc5-next-20200915-00006-g104c8fe4916b #1
> [ 6186.462833][    T1] Hardware name: linux,dummy-virt (DT)
> [ 6186.465170][    T1] pstate: 60400005 (nZCv daif +PAN -UAO BTYPE=--)
> [ 6186.467910][    T1] pc : device_property_read_string_array+0x40/0xa0
> [ 6186.470653][    T1] lr : device_property_read_string_array+0x40/0xa0

-- 
With Best Regards,
Andy Shevchenko