Re: [PATCH v3 3/4] mtd: rawnand: Add support manufacturer specific suspend/resume operation

[masonccyang@xxxxxxxxxxx]

Hi Miquel,
 
> > > > diff --git a/include/linux/mtd/rawnand.h 
b/include/linux/mtd/rawnand.h
> > > > index bc2fa3c..c0055ed 100644
> > > > --- a/include/linux/mtd/rawnand.h
> > > > +++ b/include/linux/mtd/rawnand.h
> > > > @@ -1064,6 +1064,8 @@ struct nand_legacy {
> > > >   * @lock:      lock protecting the suspended field. Also used to
> > > >   *         serialize accesses to the NAND device.
> > > >   * @suspended:      set to 1 when the device is suspended, 0 when 
 
> > it's not.
> > > > + * @_suspend:      [REPLACEABLE] specific NAND device suspend 
> > operation
> > > > + * @_resume:      [REPLACEABLE] specific NAND device resume 
operation
> > > >   * @bbt:      [INTERN] bad block table pointer
> > > >   * @bbt_td:      [REPLACEABLE] bad block table descriptor for 
flash
> > > >   *         lookup.
> > > > @@ -1119,6 +1121,8 @@ struct nand_chip {
> > > > 
> > > >     struct mutex lock;
> > > >     unsigned int suspended : 1;
> > > > +   int (*_suspend)(struct nand_chip *chip);
> > > > +   void (*_resume)(struct nand_chip *chip); 
> > > 
> > > I thought we agreed on not prefixing new hooks with _ ? 
> > 
> > For [PATCH v2] series, you mentioned to drop the _ prefix 
> > of _lock/_unlock only and we finally patched to lock_area/unlock_area.
> > 
> 
> I missed this _, this is not something we want to add.
> 
> Also, when applying your patches I had several issues because they
> where not base on the last -rc1.
> 
> Finally, I think I forgot a line when patching manually so it produces
> a warning now.
> 
> I am dropping patch 3 and 4, I keep patch 1 and 2 which seem fine.
> 
> Please send a rebased and edited v4 for these, don't forget to drop the
> kbuildtest robot tag and please also follow these slightly edited
> commit logs:
> 
> 2/4
> 
>     mtd: rawnand: Add support for manufacturer specific suspend/resume 
operation
> 
>     Patch nand_suspend() & nand_resume() to let manufacturers overwrite
>     suspend/resume operations.
> 
> 3/4
> 
>     mtd: rawnand: macronix: Add support for deep power down mode
> 
>     Macronix AD series support deep power down mode for a minimum
>     power consumption state.
> 
>     Overlaod nand_suspend() & nand_resume() in Macronix specific code to
>     support deep power down mode.

okay, will resend [PATCH v4 xx/2] for suspend/resume operation with these 
commit logs.

> 
> Thanks,
> Miquèl

thanks for your review & comments.
Mason


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