From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lars-Peter Clausen Subject: [PATCH 2/2] spi: xilinx: Return IRQ_NONE if no interrupts were detected Date: Tue, 12 Jul 2016 15:24:41 +0200 Message-ID: <1468329881-5894-2-git-send-email-lars@metafoo.de> References: <1468329881-5894-1-git-send-email-lars@metafoo.de> Cc: Michal Simek , =?UTF-8?q?S=C3=B6ren=20Brinkmann?= , Ricardo Ribalda Delgado , linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Lars-Peter Clausen To: Mark Brown Return-path: In-Reply-To: <1468329881-5894-1-git-send-email-lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Return IRQ_NONE from the interrupt handler if the handler is running, but no interrupt was detected. This allows the system to recover in case of an interrupt storm due to an invalid interrupt configuration or faulty hardware. Signed-off-by: Lars-Peter Clausen --- drivers/spi/spi-xilinx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 334f423..f8280f3 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -341,9 +341,10 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id) if (ipif_isr & XSPI_INTR_TX_EMPTY) { /* Transmission completed */ complete(&xspi->done); + return IRQ_HANDLED; } - return IRQ_HANDLED; + return IRQ_NONE; } static int xilinx_spi_find_buffer_size(struct xilinx_spi *xspi) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html