spi: s3c64xx: add missing check for polling mode

After the patch "spi/s3c64xx: Fix non-dmaengine usage"
with commit id 263a70663169de3b38d5a700252ad142ecdf09ed
submitted by Mark Brown, the spi device detection in polling
mode breaks. This revealed the missing check for polling during
dma prepare. This patch adds the missing check.

Signed-off-by: Girish K S <ks.giri@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index eb53df27e7ea81af4eefa2912da48565724d6aaa..63e2070c6c14aa8e39a64a850248e07a38546708 100644 (file)
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -434,6 +434,9 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
        dma_cap_mask_t mask;
        int ret;
 
+       if (is_polling(sdd))
+               return 0;
+
        dma_cap_zero(mask);
        dma_cap_set(DMA_SLAVE, mask);