[SCSI] ufs: rework link start-up process
Link start-up requires long time with multiphase handshakes between UFS host and device. This affects driver's probe time. This patch let link start-up run asynchronously. Link start-up will be executed at the end of prove separately. Along with this change, the following is worked. Defined completion time of uic command to avoid a permanent wait. Added mutex to guarantee of uic command at a time. Adapted some sequence of controller initialization after link statup according to HCI standard. Signed-off-by: NSeungwon Jeon <tgih.jun@samsung.com> Signed-off-by: NSujit Reddy Thumma <sthumma@codeaurora.org> Tested-by: NMaya Erez <merez@codeaurora.org> Signed-off-by: NSantosh Y <santoshsy@gmail.com> Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
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