crypto: atmel - return appropriate error code

Return -ENODEV when dma_request_slave_channel_compat() fails.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/atmel-aes.c

@@ -2383,7 +2383,6 @@ static int atmel_aes_dma_init(struct atmel_aes_dev *dd,
 			      struct crypto_platform_data *pdata)
 {
 	struct at_dma_slave *slave;
-	int err = -ENOMEM;
 	dma_cap_mask_t mask;
 
 	dma_cap_zero(mask);
@@ -2408,7 +2407,7 @@ static int atmel_aes_dma_init(struct atmel_aes_dev *dd,
 	dma_release_channel(dd->src.chan);
 err_dma_in:
 	dev_warn(dd->dev, "no DMA channel available\n");
-	return err;
+	return -ENODEV;
 }
 
 static void atmel_aes_dma_cleanup(struct atmel_aes_dev *dd)

drivers/crypto/atmel-sha.c

@@ -2628,7 +2628,6 @@ static bool atmel_sha_filter(struct dma_chan *chan, void *slave)
 static int atmel_sha_dma_init(struct atmel_sha_dev *dd,
 				struct crypto_platform_data *pdata)
 {
-	int err = -ENOMEM;
 	dma_cap_mask_t mask_in;
 
 	/* Try to grab DMA channel */
@@ -2639,7 +2638,7 @@ static int atmel_sha_dma_init(struct atmel_sha_dev *dd,
 			atmel_sha_filter, &pdata->dma_slave->rxdata, dd->dev, "tx");
 	if (!dd->dma_lch_in.chan) {
 		dev_warn(dd->dev, "no DMA channel available\n");
-		return err;
+		return -ENODEV;
 	}
 
 	dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;

drivers/crypto/atmel-tdes.c

@@ -720,7 +720,6 @@ static bool atmel_tdes_filter(struct dma_chan *chan, void *slave)
 static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd,
 			struct crypto_platform_data *pdata)
 {
-	int err = -ENOMEM;
 	dma_cap_mask_t mask;
 
 	dma_cap_zero(mask);
@@ -765,7 +764,7 @@ static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd,
 	dma_release_channel(dd->dma_lch_in.chan);
 err_dma_in:
 	dev_warn(dd->dev, "no DMA channel available\n");
-	return err;
+	return -ENODEV;
 }
 
 static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd)