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spi: xilinx: Return IRQ_NONE if no interrupts were detected

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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>
This commit is contained in:
Lars-Peter Clausen 2016-07-15 11:04:19 +02:00 committed by Mark Brown
parent 4db9bf548b
commit d336484785
1 changed files with 2 additions and 1 deletions
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3
drivers/spi/spi-xilinx.c
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@ -341,9 +341,10 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
if (ipif_isr & XSPI_INTR_TX_EMPTY) { /* Transmission completed */ if (ipif_isr & XSPI_INTR_TX_EMPTY) { /* Transmission completed */
complete(&xspi->done); complete(&xspi->done);
return IRQ_HANDLED;
} }
return IRQ_HANDLED; return IRQ_NONE;
} }
static int xilinx_spi_find_buffer_size(struct xilinx_spi *xspi) static int xilinx_spi_find_buffer_size(struct xilinx_spi *xspi)