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block: handle ENOTSUP from discard in generic code
authorPaolo Bonzini <pbonzini@redhat.com>
Fri, 22 Nov 2013 12:39:47 +0000 (13:39 +0100)
committerStefan Hajnoczi <stefanha@redhat.com>
Tue, 3 Dec 2013 14:26:49 +0000 (15:26 +0100)
commit7ce21016b69b512bf4777965a4292318f2bc7544
tree5f79714c6bdb5996906ab6e8ebdbf262621e8d92tree
parentd5ef94d43da8c57a2d597efbdec3d9a54d97fdf7commit | diff
block: handle ENOTSUP from discard in generic code

Similar to write_zeroes, let the generic code receive a ENOTSUP for
discard operations.  Since bdrv_discard has advisory semantics,
we can just swallow the error.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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