Messages in this thread Patch in this message | | | From | Vladimir Oltean <> | Subject | [PATCH v2 2/5] spi: spi-fsl-dspi: Exit the ISR with IRQ_NONE when it's not ours | Date | Fri, 23 Aug 2019 00:15:11 +0300 |
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The DSPI interrupt can be shared between two controllers at least on the LX2160A. In that case, the driver for one controller might misbehave and consume the other's interrupt. Fix this by actually checking if any of the bits in the status register have been asserted.
Fixes: 13aed2392741 ("spi: spi-fsl-dspi: use IRQF_SHARED mode to request IRQ") Signed-off-by: Vladimir Oltean <olteanv@gmail.com> --- drivers/spi/spi-fsl-dspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index c90db7db4121..6ef2279a3699 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -659,7 +659,7 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id) regmap_write(dspi->regmap, SPI_SR, spi_sr); if (!(spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF))) - return IRQ_HANDLED; + return IRQ_NONE; /* Get transfer counter (in number of SPI transfers). It was * reset to 0 when transfer(s) were started. -- 2.17.1
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