flashcp

[Tobias Simon <tobias.simon@sp-ss.de>]

Hello everybody,

I am new in this list.
Today I found a bug in the flashcp program of the mtd-utils:

In Line 260 of flashcp.c, the following operation is performed:

erase.length = filestat.st_size & ~(mtd.erasesize - 1);

I think that is not correct, because if mtd.erasesize is not a power of 2, 
using a bitmask is wrong. ARM dataflash, for instance has a erasesize of 
1056. My suggestion is the following code replacement, which uses modular 
arithmetics:

if (filestat.st_size <= mtd.erasesize)
{
   erase.length = mtd.erasesize;
}
else
{
   erase.length = filestat.st_size + mtd.erasesize - (filestat.st_size % 
mtd.erasesize);
}

What's your opinion?

-- 
Mit freundlichem Gruß / Kind regards

Tobias Simon
- Entwickler -

Simon + Puschmann Software-Systeme GbR
Tobias Simon, Andre Puschmann

Bergrat-Voigt-Straße 13
98693 Ilmenau
Tel.: 0173/2752144
E-Mail: tobias.simon@sp-ss.de
Internet: http://www.sp-ss.de

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