Reading from UBI volume character device did not work.

[Stelling Carsten]

Hello,

I'm trying to read from a UBI volume using the character device /dev/ubi2,
but read always returns 0. My kernel version is 3.14.31 (no ubiblock).

fd = open("/dev/ubi2", O_RDONLY);
read(fd, buffer, count);

I set count to different values, especially to min_io_size = 2048, but without success.
Reading from the underlying MTD device "/dev/mtd8" succeeds.
What did I miss?

My task is, as suggested by the UBIFS documentation, to write a userspace daemon
on top of UBI, that reads all LEBs and associated PEBs in the background, to let UBI
handle rarely accessed pages with accumulated bit-flips.

Your help is very much appreciated.

Thanks,

Carsten


______________________________________
 Carsten Stelling
F&E Hardware / R&D Hardware

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