[sane-devel] Bug#597922: Perfection 1650 does not work with epson2 backend

[Olaf Meeuwissen]

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On 2010?12?06? 08:47, Olaf Meeuwissen wrote:
> [...]  In case of an FSG_STATUS_FER or
> FSG_STATUS_NOT_READY one should not request any image data anymore and
> that is what the backend seems to be doing.  However, in case you get an
> FSG_STATUS_CANCEL_REQ you have to send a CAN.  The backend only sets the
> SANE_STATUS_CANCELLED flag and returns.  As a result e2_scan_finish gets
> called but that doesn't send a CAN.
> 
> Obviously, e2_scan_finish cannot know that it should.  So I'd make
> e2_ext_read send the CAN (by calling e2_cancel) before it returns
> SANE_STATUS_CANCELLED.

Untested patch attached.
- -- 
Olaf Meeuwissen, LPIC-2           FLOSS Engineer -- AVASYS CORPORATION
FSF Associate Member #1962               Help support software freedom
                 http://www.fsf.org/jf?referrer=1962
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