crypto: stm32/hash - avoid error if maxburst not defined

dma-maxburst is an optional value and must not return
error in case of dma not used (or max-burst not defined).

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index 89b0c24..37815aa 100644 (file)
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -1413,18 +1413,19 @@ MODULE_DEVICE_TABLE(of, stm32_hash_of_match);
 static int stm32_hash_get_of_match(struct stm32_hash_dev *hdev,
                                   struct device *dev)
 {
-       int err;
-
        hdev->pdata = of_device_get_match_data(dev);
        if (!hdev->pdata) {
                dev_err(dev, "no compatible OF match\n");
                return -EINVAL;
        }
 
-       err = of_property_read_u32(dev->of_node, "dma-maxburst",
-                                  &hdev->dma_maxburst);
+       if (of_property_read_u32(dev->of_node, "dma-maxburst",
+                                &hdev->dma_maxburst)) {
+               dev_info(dev, "dma-maxburst not specified, using 0\n");
+               hdev->dma_maxburst = 0;
+       }
 
-       return err;
+       return 0;
 }
 
 static int stm32_hash_probe(struct platform_device *pdev)