genirq: No need to mask non trigger mode flags before __irq_set_trigger()

Some callers of __irq_set_trigger() masks all flags except trigger mode
flags. This is unnecessary, ase __irq_set_trigger() already does this
before usage of flags.

[ tglx: Moved the flag mask and adjusted comment. Removed the hunk in
enable_percpu_irq() as it is required there ]

Signed-off-by: Alexander Kuleshov <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Thomas Gleixner <[e-mail]>

kernel/irq/chip.c

···
 	if (!desc)
 		return -EINVAL;
 
-	type &= IRQ_TYPE_SENSE_MASK;
 	ret = __irq_set_trigger(desc, type);
 	irq_put_desc_busunlock(desc, flags);
 	return ret;

kernel/irq/manage.c

···
 		return 0;
 	}
 
-	flags &= IRQ_TYPE_SENSE_MASK;
-
 	if (chip->flags & IRQCHIP_SET_TYPE_MASKED) {
 		if (!irqd_irq_masked(&desc->irq_data))
 			mask_irq(desc);
···
 			unmask = 1;
 	}
 
-	/* caller masked out all except trigger mode flags */
+	/* Mask all flags except trigger mode */
+	flags &= IRQ_TYPE_SENSE_MASK;
 	ret = chip->irq_set_type(&desc->irq_data, flags);
 
 	switch (ret) {