mtd_info_t.erasesize

[Kári Davíðsson]

Hi,

When I issue an erase command, e.g. erase /dev/mtd0 0x10000 1
I get the follwing output :

Erase Unit Size 0x2000, Erase Total 100 Units
Performing Flash Erase of length 8192 at offset 0x10000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x12000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x14000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x16000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x18000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x1a000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x1c000MTD_ioctl
MTD_ioctl
MTD : 5
Performing Flash Erase of length 8192 at offset 0x1e000MTD_ioctl
MTD_ioctl
MTD : 5

What bugs me here is that an sector of size 0x10000 (64KB) is erased
in 8 erase calls to the flash chip sector, basically making the life of
the 
flash chip 1/8th of what it should be.
While 8k sector size is correct for the first 8 sectors on the device
(it is bb cfi flash from intel), it is certainly not correct for the
rest (4MB - 8KB of the device).

Shouldn't the device geometry be exported through the mtd_info_t
structure
or am I missing something obvious (which is not unlikely 8-) )...

Regards,

K.D.


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