[PATCH] spi: rockchip: Unmask IRQ at the final to avoid preemption

[PATCH] spi: rockchip: Unmask IRQ at the final to avoid preemption

[Jon Lin]

Avoid pio_write process is preempted, resulting in abnormal state.

Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Signed-off-by: Jon <jon.lin@rock-chips.com>
---

 drivers/spi/spi-rockchip.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index a08215eb9e14..79242dc5272d 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -381,15 +381,18 @@ static int rockchip_spi_prepare_irq(struct rockchip_spi *rs,
 	rs->tx_left = rs->tx ? xfer->len / rs->n_bytes : 0;
 	rs->rx_left = xfer->len / rs->n_bytes;
 
-	if (rs->cs_inactive)
-		writel_relaxed(INT_RF_FULL | INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR);
-	else
-		writel_relaxed(INT_RF_FULL, rs->regs + ROCKCHIP_SPI_IMR);
+	writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR);
+
 	spi_enable_chip(rs, true);
 
 	if (rs->tx_left)
 		rockchip_spi_pio_writer(rs);
 
+	if (rs->cs_inactive)
+		writel_relaxed(INT_RF_FULL | INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR);
+	else
+		writel_relaxed(INT_RF_FULL, rs->regs + ROCKCHIP_SPI_IMR);
+
 	/* 1 means the transfer is in progress */
 	return 1;
 }
-- 
2.17.1

Re: [PATCH] spi: rockchip: Unmask IRQ at the final to avoid preemption

[Mark Brown]

On Fri, 17 Jun 2022 20:42:51 +0800, Jon Lin wrote:
> Avoid pio_write process is preempted, resulting in abnormal state.
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/1] spi: rockchip: Unmask IRQ at the final to avoid preemption
      commit: 419bc8f681a0dc63588cee693b6d45e7caa6006c

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