[PATCH AUTOSEL 5.15 08/23] spi: rockchip: terminate dma transmission when slave abort

Sasha Levin
2022-03-01T20:18:21Z

From: Jon Lin <jon.lin@rock-chips.com>

[ Upstream commit 80808768e41324d2e23de89972b5406c1020e6e4 ]

After slave abort, all DMA should be stopped, or it will affect the
next transmission and maybe abort again.

Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-3-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-rockchip.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 4f65ba3dd19c2..c6a1bb09be056 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -585,6 +585,12 @@ static int rockchip_spi_slave_abort(struct spi_controller *ctlr)
{
struct rockchip_spi *rs = spi_controller_get_devdata(ctlr);

+ if (atomic_read(&rs->state) & RXDMA)
+ dmaengine_terminate_sync(ctlr->dma_rx);
+ if (atomic_read(&rs->state) & TXDMA)
+ dmaengine_terminate_sync(ctlr->dma_tx);
+ atomic_set(&rs->state, 0);
+ spi_enable_chip(rs, false);
rs->slave_abort = true;
spi_finalize_current_transfer(ctlr);

--
2.34.1