[SCSI] 3w-xxxx: remove unnecessary local_irq_save/restore for scsi sg copy API
Since the commit 50bed2e2 (sg: disable interrupts inside sg_copy_buffer), no need to disable interrupts before calling scsi_sg_copy_from_buffer. So we can simplify tw_transfer_internal, which disables interrupts just for scsi_sg_copy_from_buffer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>\ Acked-by: NAdam Radford <linuxraid@amcc.com> Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
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