tree 0712fab29f774ec1bf6e4bb851cf58228486af1d
parent 5c62cb48602dba95159c81ffeca179d3852e25be
author Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1318222069 -0400
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1318513718 -0400

xen/blkback: Fix the inhibition to map pages when discarding sector ranges.

The 'operation' parameters are the ones provided to the bio layer while
the req->operation are the ones passed in between the backend and
frontend. We used the wrong 'operation' value to squash the
call to map pages when processing the discard operation resulting
in an hypercall that did nothing. Lets guard against going in the
mapping function by checking for the proper operation type.

CC: Li Dongyang <lidongyang@novell.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>