tty: bfin-sport-uart: Rx interrupt is not called always with irq disabled.
Replace local_irq_disable by local_irq_save. Signed-off-by: NSonic Zhang <sonic.zhang@analog.com> Acked-by: NAlan Cox <alan@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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