Logan Gunthorpe 5e063101ff
nvmet: cleanup nvmet_passthru_map_sg() ...
Clean up some confusing elements of nvmet_passthru_map_sg() by returning
early if the request is greater than the maximum bio size. This allows
us to drop the sg_cnt variable.
This should not result in any functional change but makes the code
clearer and more understandable. The original code allocated a truncated
bio then would return EINVAL when bio_add_pc_page() filled that bio. The
new code just returns EINVAL early if this would happen.
Fixes: c1fef73f79logang@deltatee.com >
Suggested-by: Douglas Gilbert <dgilbert@interlog.com >
Reviewed-by: Sagi Grimberg <sagi@grimberg.me >
Cc: Christoph Hellwig <hch@lst.de >
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com >
Signed-off-by: Christoph Hellwig <hch@lst.de >
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