crypto: img-hash - Use dma_request_chan instead dma_request_slave_channel

dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index fe4cc8b..25d5227 100644 (file)
--- a/drivers/crypto/img-hash.c
+++ b/drivers/crypto/img-hash.c
@@ -332,10 +332,10 @@ static int img_hash_dma_init(struct img_hash_dev *hdev)
        struct dma_slave_config dma_conf;
        int err = -EINVAL;
 
-       hdev->dma_lch = dma_request_slave_channel(hdev->dev, "tx");
-       if (!hdev->dma_lch) {
+       hdev->dma_lch = dma_request_chan(hdev->dev, "tx");
+       if (IS_ERR(hdev->dma_lch)) {
                dev_err(hdev->dev, "Couldn't acquire a slave DMA channel.\n");
-               return -EBUSY;
+               return PTR_ERR(hdev->dma_lch);
        }
        dma_conf.direction = DMA_MEM_TO_DEV;
        dma_conf.dst_addr = hdev->bus_addr;