bio_endio error codes

Hello Gurus,

Please disregard my earlier mail due to poor formatting?
and readability.

I'm developing a block driver using?the make_request?
method,?effectively bypassing existing scsi?or request?
stack in block layer. ?So?that means im directly?
working with?bios. ?As prescribed in linux?
documentation and from referring?to similar?
drivers in kernel, you?close a session with a?
bio with the?bio_endio function.

I usually invoke bio_endio during?successful?
I/O completion, meaning?with an error code?
of zero. ?But?there are cases that this is not?
fulfilled or there are error cases. ?My?question
?is, what are the valid error?codes that can be?
used with it? ?My?initial impression is that?
other than?zero as error code, bio_endio will?
fail. ?I've read somewhere that -EBUSY is not?
recognized, and I tried?-EIO but my driver?
crashed. ?I got a?panic in some dio_xxx function?
leading from bio_endio(bio,-EIO). I?would?
like to block subsequent bios?sent to me after?
reaching my queue?depth and with no tags left,?
and so I?want to use bio_endio with an error?
code.

What are those error codes, and will?they work?
for my intended function? ?Or is there a better?
way aside from bio_endio??Thanks!



Sent from Samsung Mobile
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