Commit 0400b697 authored by Haavard Skinnemoen's avatar Haavard Skinnemoen Committed by Linus Torvalds

atmel_serial: fix interrupt handler return value

We should only return IRQ_HANDLED when we actually found something to
handle. This is important since the USART interrupt handler may be
shared with the timer interrupt on some chips.
Pointed-out-by: default avatarmichael <trimarchi@gandalf.sssup.it>
Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 98bcef56
......@@ -549,7 +549,7 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id)
atmel_handle_transmit(port, pending);
} while (pass_counter++ < ATMEL_ISR_PASS_LIMIT);
return IRQ_HANDLED;
return pass_counter ? IRQ_HANDLED : IRQ_NONE;
}
/*
......
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