From: Tobias Schramm <t.schramm@xxxxxxxxxxx> [ Upstream commit ae1ba50f1e706dfd7ce402ac52c1f1f10becad68 ] Previously the stm32h7 interrupt thread cleared all non-masked interrupts. If an interrupt was to occur during the handling of another interrupt its flag would be unset, resulting in a lost interrupt. This patches fixes the issue by clearing only the currently set interrupt flags. Signed-off-by: Tobias Schramm <t.schramm@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20200804195136.1485392-1-t.schramm@xxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/spi/spi-stm32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 9672cda2f8031..13f3d959759fb 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -967,7 +967,7 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) if (!spi->cur_usedma && (spi->rx_buf && (spi->rx_len > 0))) stm32h7_spi_read_rxfifo(spi, false); - writel_relaxed(mask, spi->base + STM32H7_SPI_IFCR); + writel_relaxed(sr & mask, spi->base + STM32H7_SPI_IFCR); spin_unlock_irqrestore(&spi->lock, flags); -- 2.25.1
