libata: call ata_check_atapi_dma() with qc better prepared
In atapi_xlat(), prepare qc better before calling ata_check_atapi_dma() such that ata_check_atapi_dma() can use info from qc. While at it, reformat weird looking if/else block in the function. Signed-off-by: NTejun Heo <htejun@gmail.com> Signed-off-by: NJeff Garzik <jeff@garzik.org>
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