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[v2,2/2] spi: xilinx: Return IRQ_NONE if no interrupts were detected

Message ID 1468573459-3071-2-git-send-email-lars@metafoo.de (mailing list archive)
State New, archived
Headers show

Commit Message

Lars-Peter Clausen July 15, 2016, 9:04 a.m. UTC 
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 <lars@metafoo.de>
Acked-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
No changes since v1
---
 drivers/spi/spi-xilinx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index e62eb9a..bc7100b 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)