[U-Boot] [PATCH v3 09/11] mtd: Don't stop MTD partition creation when it fails on one device

[Heiko Schocher]

Hello Boris,

Am 19.11.2018 um 21:59 schrieb Boris Brezillon:
> MTD partition creation code is a bit tricky. It tries to figure out
> when things have changed (either MTD dev list or mtdparts/mtdids vars)
> and when that happens it first deletes all the partitions that had been
> previously created and then creates the new ones based on the new
> mtdparts/mtdids values.
> But before deleting the old partitions, it ensures that none of the
> currently registered parts are being used and bails out when that's
> not the case. So, we end up in a situation where, if at least one MTD
> dev has one of its partitions used by someone (UBI for instance), the
> partitions update logic no longer works for other devs.
> 
> Rework the code to relax the logic and allow updates of MTD parts on
> devices that are not being used (we still refuse to updates parts on
> devices who have at least one of their partitions used by someone).
> 
> Fixes: 5db66b3aee6f ("cmd: mtd: add 'mtd' command")
> Signed-off-by: Boris Brezillon <boris.brezillon at bootlin.com>
> ---
> Changes in v3:
> - None
> 
> Changes in v2:
> - New patch
> 
> Changes in v3:
> - Re-create partitions when our last attempt do delete all existing
>    parts failed. This way we can update parts after ubi detach has
>    been called without having to change mtdparts/mtdids.
> ---
>   drivers/mtd/mtd_uboot.c | 96 +++++++++++++++++++++++++++++------------
>   drivers/mtd/mtdpart.c   | 12 ++++++
>   include/linux/mtd/mtd.h |  2 +
>   3 files changed, 82 insertions(+), 28 deletions(-)

Tested-by: Heiko Schocher <hs at denx.de>

bye,
Heiko
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