scsi: qla2xxx: Add lock protection around host lookup
Host lookup via btree is currently protected by the hardware_lock. Add hardware_lock when modifying btree to store host pointer. Signed-off-by: NQuinn Tran <quinn.tran@cavium.com> Signed-off-by: NHimanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
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