The patch spi: spi-fsl-dspi: Exit the ISR with IRQ_NONE when it's not ours has been applied to the spi tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-5.4 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 37b4100180641968056cb4e034cebc38338e8652 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean <olteanv@xxxxxxxxx> Date: Fri, 23 Aug 2019 00:15:11 +0300 Subject: [PATCH] spi: spi-fsl-dspi: Exit the ISR with IRQ_NONE when it's not ours 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@xxxxxxxxx> Link: https://lore.kernel.org/r/20190822211514.19288-3-olteanv@xxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> --- 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. -- 2.20.1
