crypto: bfin_crc - Fix possible NULL pointer dereference

If we define dev_dbg(), then there is a possible NULL pointer
dereference.

Signed-off-by: Syam Sidhardhan <s.syam@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/bfin_crc.c b/drivers/crypto/bfin_crc.c
index 827913d..d797f31 100644 (file)
--- a/drivers/crypto/bfin_crc.c
+++ b/drivers/crypto/bfin_crc.c
@@ -151,7 +151,7 @@ static int bfin_crypto_crc_init(struct ahash_request *req)
        struct bfin_crypto_crc_reqctx *ctx = ahash_request_ctx(req);
        struct bfin_crypto_crc *crc;
 
-       dev_dbg(crc->dev, "crc_init\n");
+       dev_dbg(ctx->crc->dev, "crc_init\n");
        spin_lock_bh(&crc_list.lock);
        list_for_each_entry(crc, &crc_list.dev_list, list) {
                crc_ctx->crc = crc;
@@ -160,7 +160,7 @@ static int bfin_crypto_crc_init(struct ahash_request *req)
        spin_unlock_bh(&crc_list.lock);
 
        if (sg_count(req->src) > CRC_MAX_DMA_DESC) {
-               dev_dbg(crc->dev, "init: requested sg list is too big > %d\n",
+               dev_dbg(ctx->crc->dev, "init: requested sg list is too big > %d\n",
                        CRC_MAX_DMA_DESC);
                return -EINVAL;
        }
@@ -175,7 +175,7 @@ static int bfin_crypto_crc_init(struct ahash_request *req)
        /* init crc results */
        put_unaligned_le32(crc_ctx->key, req->result);
 
-       dev_dbg(crc->dev, "init: digest size: %d\n",
+       dev_dbg(ctx->crc->dev, "init: digest size: %d\n",
                crypto_ahash_digestsize(tfm));
 
        return bfin_crypto_crc_init_hw(crc, crc_ctx->key);