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More linux driver woes:
Driver is passed a file position and byte count when asked to read from a device. Sounds easy, right? FUCK no.
For reads, driver is passed struct `filp` with field `f_pos`, a direct pointer to the same struct field, int `count` as a number of bytes to read, and `buf` to return those bytes with. Problem is, requesting, say, 256 bytes from location 10000000h will give the driver `filp->f_pos = 0`, `f_pos = 256`, and `count = 0`. I don't know how to fix this and there's NO help for this shit. None whatsoever.
This shit, right here, is why Linux drivers suck ass.
rant