Re: mtd_info->write

[Abraham vd Merwe <abraham@2d3d.co.za>]

[-- Attachment #1: Type: text/plain, Size: 1442 bytes --]

Hi Frederic!

> I am almost sure that you have to validate the erase state of the sector you
> want to write to.  For example, I use cfi_amdstd_write function, and
> absolutely no validation is made in that fonction for this.

You mean the user process/module has to, not the chip driver? I'm writing a
chip driver and I want to know whether the chip driver is responsible for
the checking.

I noticed the other chip drivers (like you say here) doesn't so I'm assuming
I don't have to but I just want to make sure.

> > If the data is all ones ("1"), it has been erased.   If not, it has not.
> 
> Yes, I know, but I want to know whether I have to check if that's the case
> or not.
> 
> > Can you safely assume in the MTD write function that the blocks on which
> the
> > data is have been erased or do you actually have to do some error checking
> > and return with -EINVAL if you discover that it's not been erased?

-- 

Regards
 Abraham

Chemistry professors never die, they just fail to react.

__________________________________________________________
 Abraham vd Merwe - 2d3D, Inc.

 Device Driver Development, Outsourcing, Embedded Systems

  Cell: +27 82 565 4451         Snailmail:
   Tel: +27 21 761 7549            Block C, Antree Park
   Fax: +27 21 761 7648            Doncaster Road
 Email: abraham@2d3d.co.za         Kenilworth, 7700
  Http: http://www.2d3d.com        South Africa


[-- Attachment #2: Type: application/pgp-signature, Size: 232 bytes --]