Re: block: add a bi_error field to struct bio

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On Wed, Jun 10 2015 at 11:26am -0400,
Mike Snitzer <snitzer@xxxxxxxxxx> wrote:

> On Wed, Jun 10 2015 at  4:11am -0400,
> Christoph Hellwig <hch@xxxxxx> wrote:
> 
> > On Thu, Jun 04, 2015 at 11:31:07AM -0400, Mike Snitzer wrote:
> > > This patch _really_ concerns me because just in DM alone I found you
> > > took liberties that you shouldn't have and created a regression.  First
> > > issue is a real bug (your proposed dm-io.c:dmio_complete change missed
> > > that dm-io uses error_bits and not traditional error code like expected)
> > 
> > Point taken.  I already wanted to complain about the mess due to the bio
> > error abuse with it's own values in DM in the first posting, guess I
> > need to add that to the second one.  I don't think overloading common
> > interfaces with your private error codes is a good idea, but let's
> > leave that for a separate discussion.
> 
> I'll queue a patch to rename 'error' to 'error_bits' where appropriate.

See: https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-next&id=f368f463e4cef696ad6b102dbaf5c10dfca7cc63
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