ide-disk: add ide_tf_set_cmd() helper
* Add ide_tf_set_cmd() helper for selecting/setting command and data phase (note: DMA data phases are there for completness, they are not required ATM). * Set IDE_TFLAG_WRITE taskfile flag for write requests in __ide_do_rw_disk(). * Convert __ide_do_rw_disk() to use the new ide_tf_set_cmd() helper. There should be no functionality changes caused by this patch. Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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