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authorLars-Peter Clausen <lars@metafoo.de>2016-07-15 11:04:19 +0200
committerMark Brown <broonie@kernel.org>2016-07-15 11:45:00 +0100
commitd33648478501407267557b1bf6897169625f4178 (patch)
treeda437860abc01e6dc77152563cc068c64084771c
parent4db9bf548bb00d84ba7dfd70f124de16386c0c55 (diff)
spi: xilinx: Return IRQ_NONE if no interrupts were detected
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> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--drivers/spi/spi-xilinx.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index e62eb9ace825..bc7100b93dfc 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)