block/xen-blkfront: Split blkif_queue_request in 2
Currently, blkif_queue_request has 2 distinct execution path: - Send a discard request - Send a read/write request The function is also allocating grants to use for generating the request. Although, this is only used for read/write request. Rather than having a function with 2 distinct execution path, separate the function in 2. This will also remove one level of tabulation. Signed-off-by: NJulien Grall <julien.grall@citrix.com> Reviewed-by: NRoger Pau Monné <roger.pau@citrix.com> Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>
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