spi: rockchip: initialize dma_slave_config properly

[ Upstream commit dd8fd2cbc73f8650f651da71fc61a6e4f30c1566 ]

The rxconf and txconf structs are allocated on the
stack, so make sure we zero them before filling out
the relevant fields.

Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 035767c..f42ae9e 100644 (file)
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -444,6 +444,9 @@ static void rockchip_spi_prepare_dma(struct rockchip_spi *rs)
        struct dma_slave_config rxconf, txconf;
        struct dma_async_tx_descriptor *rxdesc, *txdesc;
 
+       memset(&rxconf, 0, sizeof(rxconf));
+       memset(&txconf, 0, sizeof(txconf));
+
        spin_lock_irqsave(&rs->lock, flags);
        rs->state &= ~RXBUSY;
        rs->state &= ~TXBUSY;