[U-Boot] [PATCH 3/4] mtd: Delete partitions attached to the device when a device is deleted

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Heiko,

Heiko Schocher <hs@denx.de> wrote on Mon, 19 Nov 2018 07:16:53 +0100:

> Hello Boris,
> 
> Am 17.11.2018 um 10:19 schrieb Boris Brezillon:
> > On Fri, 16 Nov 2018 15:40:25 +0100
> > Boris Brezillon <boris.brezillon@bootlin.com> wrote:  
> > >> If we don't do that, partitions might still be exposed while the  
> >> underlying device is gone.
> >>
> >> Fixes: 2a74930da57f ("mtd: mtdpart: implement proper partition handling")
> >> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
> >> ---
> >>   drivers/mtd/mtdcore.c   |  1 +
> >>   include/linux/mtd/mtd.h | 14 ++++++++++++++
> >>   2 files changed, 15 insertions(+)
> >>
> >> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> >> index 7a15ded8c883..46657fe7c949 100644
> >> --- a/drivers/mtd/mtdcore.c
> >> +++ b/drivers/mtd/mtdcore.c
> >> @@ -528,6 +528,7 @@ int del_mtd_device(struct mtd_info *mtd)
> >>   	struct mtd_notifier *not;
> >>   #endif  
> >>   >> +	del_mtd_partitions(mtd);  
> >>   	mutex_lock(&mtd_table_mutex);  
> >>   >>   	if (idr_find(&mtd_idr, mtd->index) != mtd) {  
> >> diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
> >> index d20ebd820289..c5b58dd3f0f7 100644
> >> --- a/include/linux/mtd/mtd.h
> >> +++ b/include/linux/mtd/mtd.h
> >> @@ -562,8 +562,22 @@ unsigned mtd_mmap_capabilities(struct mtd_info *mtd);
> >>   /* drivers/mtd/mtdcore.h */
> >>   int add_mtd_device(struct mtd_info *mtd);
> >>   int del_mtd_device(struct mtd_info *mtd);
> >> +
> >> +#ifdef CONFIG_MTD_PARTITIONS
> >>   int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
> >>   int del_mtd_partitions(struct mtd_info *);
> >> +#else
> >> +static inline int add_mtd_partitions(struct mtd_info *,
> >> +				     const struct mtd_partition *, int)
> > > Args should have names.  
> > >> +{  
> >> +	return 0;
> >> +}
> >> +
> >> +static int del_mtd_partitions(struct mtd_info *)
> > > Missing inline here.
> > > I'll send a v2 fixing those 2 bugs.  
> 
> Thanks!
> 
> I tried your patchset, with them "ubi part ubi" does now work, also
> after a "sf probe" ...
> 
> There is one problem, see log [1].
> 
> If you have an ubi partition attached (In my example on the NAND),
> and issue "sf probe", the following "mtd list" shows not anymore
> the SPI NOR MTD partitions. (It prints an error message
> "Partition "ubi" already in use, aborting")
> 
> If I detach UBI from the NAND MTD partition, the MTD Partitions on
> the SPI NOR are again found after a "sf probe" before "mtd list" [2]

I will have just a little time to look into this issue today, so
there is a quick fix, please tell me if it works for you, otherwise
I'll try to find more time during this week to look into it.


Thanks,
Miquèl

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