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xen/blkback: Check for proper operation.
The patch titled: "xen/blkback: Fix the inhibition to map pages when discarding sector ranges." had the right idea except that it used the wrong comparison operator. It had == instead of !=. This fixes the bug where all (except discard) operations would have been ignored. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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@ -707,7 +707,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
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* the hypercall to unmap the grants - that is all done in
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* xen_blkbk_unmap.
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*/
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if (operation == REQ_DISCARD && xen_blkbk_map(req, pending_req, seg))
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if (operation != REQ_DISCARD && xen_blkbk_map(req, pending_req, seg))
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goto fail_flush;
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/*
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