crypto: caam - add missing put_device() call

The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.

Fixes: 35af640 ("crypto: caam - Check for CAAM block presence before registering with crypto layer")
Fixes: b189817 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Wen Yang <yellowriver2010@hotmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/caamalg.c

@@ -3455,7 +3455,6 @@ static int __init caam_algapi_init(void)
 {
 	struct device_node *dev_node;
 	struct platform_device *pdev;
-	struct device *ctrldev;
 	struct caam_drv_private *priv;
 	int i = 0, err = 0;
 	u32 aes_vid, aes_inst, des_inst, md_vid, md_inst, ccha_inst, ptha_inst;
@@ -3476,16 +3475,17 @@ static int __init caam_algapi_init(void)
 		return -ENODEV;
 	}
 
-	ctrldev = &pdev->dev;
-	priv = dev_get_drvdata(ctrldev);
+	priv = dev_get_drvdata(&pdev->dev);
 	of_node_put(dev_node);
 
 	/*
 	 * If priv is NULL, it's probably because the caam driver wasn't
 	 * properly initialized (e.g. RNG4 init failed). Thus, bail out here.
 	 */
-	if (!priv)
-		return -ENODEV;
+	if (!priv) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 
 	/*
@@ -3626,6 +3626,8 @@ static int __init caam_algapi_init(void)
 	if (registered)
 		pr_info("caam algorithms registered in /proc/crypto\n");
 
+out_put_dev:
+	put_device(&pdev->dev);
 	return err;
 }
 

drivers/crypto/caam/caamalg_qi.c

@@ -2492,12 +2492,15 @@ static int __init caam_qi_algapi_init(void)
 	 * If priv is NULL, it's probably because the caam driver wasn't
 	 * properly initialized (e.g. RNG4 init failed). Thus, bail out here.
 	 */
-	if (!priv || !priv->qi_present)
-		return -ENODEV;
+	if (!priv || !priv->qi_present) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 	if (caam_dpaa2) {
 		dev_info(ctrldev, "caam/qi frontend driver not suitable for DPAA 2.x, aborting...\n");
-		return -ENODEV;
+		err = -ENODEV;
+		goto out_put_dev;
 	}
 
 	/*
@@ -2610,6 +2613,8 @@ static int __init caam_qi_algapi_init(void)
 	if (registered)
 		dev_info(priv->qidev, "algorithms registered in /proc/crypto\n");
 
+out_put_dev:
+	put_device(ctrldev);
 	return err;
 }
 

drivers/crypto/caam/caamhash.c

@@ -1993,7 +1993,6 @@ static int __init caam_algapi_hash_init(void)
 {
 	struct device_node *dev_node;
 	struct platform_device *pdev;
-	struct device *ctrldev;
 	int i = 0, err = 0;
 	struct caam_drv_private *priv;
 	unsigned int md_limit = SHA512_DIGEST_SIZE;
@@ -2012,16 +2011,17 @@ static int __init caam_algapi_hash_init(void)
 		return -ENODEV;
 	}
 
-	ctrldev = &pdev->dev;
-	priv = dev_get_drvdata(ctrldev);
+	priv = dev_get_drvdata(&pdev->dev);
 	of_node_put(dev_node);
 
 	/*
 	 * If priv is NULL, it's probably because the caam driver wasn't
 	 * properly initialized (e.g. RNG4 init failed). Thus, bail out here.
 	 */
-	if (!priv)
-		return -ENODEV;
+	if (!priv) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 	/*
 	 * Register crypto algorithms the device supports.  First, identify
@@ -2043,8 +2043,10 @@ static int __init caam_algapi_hash_init(void)
 	 * Skip registration of any hashing algorithms if MD block
 	 * is not present.
 	 */
-	if (!md_inst)
-		return -ENODEV;
+	if (!md_inst) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 	/* Limit digest size based on LP256 */
 	if (md_vid == CHA_VER_VID_MD_LP256)
@@ -2101,6 +2103,8 @@ static int __init caam_algapi_hash_init(void)
 			list_add_tail(&t_alg->entry, &hash_list);
 	}
 
+out_put_dev:
+	put_device(&pdev->dev);
 	return err;
 }
 

drivers/crypto/caam/caampkc.c

@@ -1042,8 +1042,10 @@ static int __init caam_pkc_init(void)
 	 * If priv is NULL, it's probably because the caam driver wasn't
 	 * properly initialized (e.g. RNG4 init failed). Thus, bail out here.
 	 */
-	if (!priv)
-		return -ENODEV;
+	if (!priv) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 	/* Determine public key hardware accelerator presence. */
 	if (priv->era < 10)
@@ -1053,8 +1055,10 @@ static int __init caam_pkc_init(void)
 		pk_inst = rd_reg32(&priv->ctrl->vreg.pkha) & CHA_VER_NUM_MASK;
 
 	/* Do not register algorithms if PKHA is not present. */
-	if (!pk_inst)
-		return -ENODEV;
+	if (!pk_inst) {
+		err =  -ENODEV;
+		goto out_put_dev;
+	}
 
 	err = crypto_register_akcipher(&caam_rsa);
 	if (err)
@@ -1063,6 +1067,8 @@ static int __init caam_pkc_init(void)
 	else
 		dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n");
 
+out_put_dev:
+	put_device(ctrldev);
 	return err;
 }
 

drivers/crypto/caam/caamrng.c

@@ -308,7 +308,6 @@ static int __init caam_rng_init(void)
 	struct device *dev;
 	struct device_node *dev_node;
 	struct platform_device *pdev;
-	struct device *ctrldev;
 	struct caam_drv_private *priv;
 	u32 rng_inst;
 	int err;
@@ -326,16 +325,17 @@ static int __init caam_rng_init(void)
 		return -ENODEV;
 	}
 
-	ctrldev = &pdev->dev;
-	priv = dev_get_drvdata(ctrldev);
+	priv = dev_get_drvdata(&pdev->dev);
 	of_node_put(dev_node);
 
 	/*
 	 * If priv is NULL, it's probably because the caam driver wasn't
 	 * properly initialized (e.g. RNG4 init failed). Thus, bail out here.
 	 */
-	if (!priv)
-		return -ENODEV;
+	if (!priv) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 	/* Check for an instantiated RNG before registration */
 	if (priv->era < 10)
@@ -344,13 +344,16 @@ static int __init caam_rng_init(void)
 	else
 		rng_inst = rd_reg32(&priv->ctrl->vreg.rng) & CHA_VER_NUM_MASK;
 
-	if (!rng_inst)
-		return -ENODEV;
+	if (!rng_inst) {
+		err = -ENODEV;
+		goto out_put_dev;
+	}
 
 	dev = caam_jr_alloc();
 	if (IS_ERR(dev)) {
 		pr_err("Job Ring Device allocation for transform failed\n");
-		return PTR_ERR(dev);
+		err = PTR_ERR(dev);
+		goto out_put_dev;
 	}
 	rng_ctx = kmalloc(sizeof(*rng_ctx), GFP_DMA | GFP_KERNEL);
 	if (!rng_ctx) {
@@ -361,13 +364,16 @@ static int __init caam_rng_init(void)
 	if (err)
 		goto free_rng_ctx;
 
+	put_device(&pdev->dev);
 	dev_info(dev, "registering rng-caam\n");
 	return hwrng_register(&caam_rng);
 
 free_rng_ctx:
 	kfree(rng_ctx);
 free_caam_alloc:
 	caam_jr_free(dev);
+out_put_dev:
+	put_device(&pdev->dev);
 	return err;
 }