[RFC v2 02/20] blk: add a helper function, blk_probe_or_unbind()

[AKASHI Takahiro]

Hi Simon,

Thank you for your review on this series.

On Mon, Dec 13, 2021 at 05:51:40AM -0700, Simon Glass wrote:
> Hi Takahiro,
> 
> On Thu, 9 Dec 2021 at 23:59, AKASHI Takahiro <takahiro.akashi at linaro.org> wrote:
> >
> > This function will be commonly used in block device drivers
> > in the succeeding patches.
> >
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
> > ---
> >  drivers/block/blk-uclass.c | 13 +++++++++++++
> >  include/blk.h              | 12 ++++++++++++
> >  2 files changed, 25 insertions(+)
> 
> Reviewed-by: Simon Glass <sjg at chromium.org>
> 
> But please add a test for this.

Well, how can we test this simple function?
I can't simply imagine what the meaningful test scenario is.

> >
> > diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
> > index 83682dcc181a..f7ad90e8890f 100644
> > --- a/drivers/block/blk-uclass.c
> > +++ b/drivers/block/blk-uclass.c
> > @@ -670,6 +670,19 @@ int blk_create_devicef(struct udevice *parent, const char *drv_name,
> >         return 0;
> >  }
> >
> > +int blk_probe_or_unbind(struct udevice *dev)
> > +{
> > +       int ret;
> > +
> > +       ret = device_probe(dev);
> > +       if (ret) {
> > +               debug("probing %s failed\n", dev->name);
> > +               device_unbind(dev);
> > +       }
> > +
> > +       return ret;
> > +}
> > +
> >  int blk_unbind_all(int if_type)
> >  {
> >         struct uclass *uc;
> > diff --git a/include/blk.h b/include/blk.h
> > index f0cc7ca1a28c..ef79e7b27b0a 100644
> > --- a/include/blk.h
> > +++ b/include/blk.h
> > @@ -369,6 +369,18 @@ int blk_create_devicef(struct udevice *parent, const char *drv_name,
> >                        const char *name, int if_type, int devnum, int blksz,
> >                        lbaint_t lba, struct udevice **devp);
> >
> > +/**
> > + * blk_probe_or_unbind() - Try to probe
> > + *
> > + * Try to probe the device, primarily for enumelating partitions.
> 
> enumerating

Ah, OK.

-Takahiro Akashi

> 
> 
> > + * If it fails, the device itself is unbound since it means that it won't
> > + * work any more.
> > + *
> > + * @dev:       The device to probe
> > + * @return 0 if OK, -ve on error
> > + */
> > +int blk_probe_or_unbind(struct udevice *dev);
> > +
> >  /**
> >   * blk_unbind_all() - Unbind all device of the given interface type
> >   *
> > --
> > 2.33.0
> >