an be held for the entire time traversing the link
list objects, and the bitmask was set to indicate which device handles need
blocking. Oustide the lock the ioc->blocking_handles bitmask is traversed,
with the respective device handle the scsi mid layer is called for moving
devices into blocking state.

Signed-off-by: Nagalakshmi Nandigama <nagalakshmi.nandigama@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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