pwm: pwm-rockchip-i2s: initialize the dma_slave_config to zero

Fixes: ddd2e87("dmaengine: pl330: add support for interlace size config")

Change-Id: I685d911f41f4654792a0b8cdecf29f928e938656
Signed-off-by: Ziyuan Xu <[email protected]>

Author: Ziyuan Xu

drivers/pwm/pwm-rockchip-i2s.c

@@ -312,6 +312,8 @@ static int rockchip_i2s_pwm_dma_request(struct rockchip_i2s_pwm_chip *pc,
 	struct dma_slave_config dma_sconfig;
 	int ret;
 
+	memset(&dma_sconfig, 0, sizeof(dma_sconfig));
+
 	dma->chan_tx = dma_request_slave_channel(dev, "tx");
 	if (!dma->chan_tx) {
 		dev_err(dev, "can't request DMA tx channel\n");