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Message-Id: <1203612992-18588-1-git-send-email-hskinnemoen@atmel.com> Date: Thu, 21 Feb 2008 17:56:32 +0100 From: Haavard Skinnemoen <hskinnemoen@...el.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, Andrew Victor <linux@...im.org.za>, michael <trimarchi@...dalf.sssup.it>, Haavard Skinnemoen <hskinnemoen@...el.com> Subject: [PATCH] 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: michael <trimarchi@...dalf.sssup.it> Signed-off-by: Haavard Skinnemoen <hskinnemoen@...el.com> --- drivers/serial/atmel_serial.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index fad245b..d57bf3e 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -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; } /* -- 1.5.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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