ide: don't disable interrupts during kmap_atomic()

ide_pio_bytes() disables interrupts around kmap_atomic(). This is a
leftover from the old kmap_atomic() implementation which relied on fixed
mapping slots, so the caller had to make sure that the same slot could not
be reused from an interrupting context.

kmap_atomic() was changed to dynamic slots long ago and commit 1ec9c5ddc17a
("include/linux/highmem.h: remove the second argument of k[un]map_atomic()")
removed the slot assignements, but the callers were not checked for now
redundant interrupt disabling.

Remove the conditional interrupt disable.

Signed-off-by: Sebastian Andrzej Siewior <[e-mail]>
Acked-by: David S. Miller <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/ide/ide-taskfile.c

···
 
 	while (len) {
 		unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
-		int page_is_high;
 
 		page = sg_page(cursg);
 		offset = cursg->offset + cmd->cursg_ofs;
···
 		offset %= PAGE_SIZE;
 
 		nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
-
-		page_is_high = PageHighMem(page);
-		if (page_is_high)
-			local_irq_save(flags);
 
 		buf = kmap_atomic(page) + offset;
 
···
 			hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 
 		kunmap_atomic(buf);
-
-		if (page_is_high)
-			local_irq_restore(flags);
 
 		len -= nr_bytes;
 	}