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Re: [PATCH v5 3/5] mtd: handle partitioning on devices with 0 erasesize

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  Re: [PATCH v5 3/5] mtd: handle partitioning on devices with 0  erasesize Chris Packham <Chris.Packham@alliedtelesis.co.nz> - 2017-07-04 05:30 +0200
    Re: [PATCH v5 3/5] mtd: handle partitioning on devices with 0  erasesize Brian Norris <computersforpeace@gmail.com> - 2017-07-08 03:20 +0200

#1680645 — Re: [PATCH v5 3/5] mtd: handle partitioning on devices with 0 erasesize

Hi,

On 02/06/17 15:21, Chris Packham wrote:
> erasesize is meaningful for flash devices but for SRAM there is no
> concept of an erase block so erasesize is set to 0. When partitioning
> these devices instead of ensuring partitions fall on erasesize
> boundaries we ensure they fall on writesize boundaries.
> 
> Helped-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>

I had someone mention to me in passing that mtdinfo was failing for them 
(crashing with some floating point error). I'm wondering if we've 
created a divide-by-zero problem by reporting 0 erase size in /proc/mtd. 
I don't have any other info and right now I don't have access to the 
system I had with the mchp23lcv1024 sram.

Andrew, do you still have access to your device?

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#1683500

On Tue, Jul 04, 2017 at 03:22:52AM +0000, Chris Packham wrote:
> I had someone mention to me in passing that mtdinfo was failing for them 
> (crashing with some floating point error). I'm wondering if we've 
> created a divide-by-zero problem by reporting 0 erase size in /proc/mtd. 
> I don't have any other info and right now I don't have access to the 
> system I had with the mchp23lcv1024 sram.

Wouldn't be that surprising. mtdinfo is actually developed under the
"ubi-utils" directory of mtd-utils, and UBI wouldn't know what to do
with and SRAM like that.

Brian

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