Re: [PATCH 1/3] mtd: spi-nor: Export SFDP access to sysfs

From: Michael Walle
Date: Wed Apr 28 2021 - 11:51:11 EST


Am 2021-04-28 17:37, schrieb Alexander Williams:
On Wed, Apr 28, 2021 at 12:58 AM Michael Walle <michael@xxxxxxxx> wrote:

Hi Alexander,

Am 2021-04-28 07:27, schrieb Alexander Williams:
> Add the ability to specify a technology-specific attribute_group, and
> expose the SFDP through spi-nor's private group. This enables user
> space
> to have full access to the contents of the SFDP, so all information is
> available without regard for whether the kernel supports parsing it.

Please see:
https://lore.kernel.org/linux-mtd/20210318092406.5340-1-michael@xxxxxxxx/

Thanks for the pointer! Sorry I didn't see that patch series already: My search
skills need some work... In any case, there's no good reason for me to duplicate
work.

I should probably comment on that series directly, but I'll note that one thing
I tried to do with the sysfs attributes here was avoid racing with user space.
The uevent is suppressed until all the related files are created in sysfs. See
http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/ for
Greg's explanation of a scenario.

Sure, reviews and remarks are always welcome. Btw. what is patch 2/3 and 3/3?
I couldn't find it on the LKML.

-michael