Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 4.3:

  API:

   - the AEAD interface transition is now complete.
   - add top-level skcipher interface.

  Drivers:

   - x86-64 acceleration for chacha20/poly1305.
   - add sunxi-ss Allwinner Security System crypto accelerator.
   - add RSA algorithm to qat driver.
   - add SRIOV support to qat driver.
   - add LS1021A support to caam.
   - add i.MX6 support to caam"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (163 commits)
  crypto: algif_aead - fix for multiple operations on AF_ALG sockets
  crypto: qat - enable legacy VFs
  MPI: Fix mpi_read_buffer
  crypto: qat - silence a static checker warning
  crypto: vmx - Fixing opcode issue
  crypto: caam - Use the preferred style for memory allocations
  crypto: caam - Propagate the real error code in caam_probe
  crypto: caam - Fix the error handling in caam_probe
  crypto: caam - fix writing to JQCR_MS when using service interface
  crypto: hash - Add AHASH_REQUEST_ON_STACK
  crypto: testmgr - Use new skcipher interface
  crypto: skcipher - Add top-level skcipher interface
  crypto: cmac - allow usage in FIPS mode
  crypto: sahara - Use dmam_alloc_coherent
  crypto: caam - Add support for LS1021A
  crypto: qat - Don't move data inside output buffer
  crypto: vmx - Fixing GHASH Key issue on little endian
  crypto: vmx - Fixing AES-CTR counter bug
  crypto: null - Add missing Kconfig tristate for NULL2
  crypto: nx - Add forward declaration for struct crypto_aead
  ...

1 files changed, 21 insertions, 5 deletions

diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index 5095337205b8..9b92af2c7241 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -108,6 +108,10 @@ static void rng_done(struct device *jrdev, u32 *desc, u32 err, void *context)
 
 	atomic_set(&bd->empty, BUF_NOT_EMPTY);
 	complete(&bd->filled);
+
+	/* Buffer refilled, invalidate cache */
+	dma_sync_single_for_cpu(jrdev, bd->addr, RN_BUF_SIZE, DMA_FROM_DEVICE);
+
 #ifdef DEBUG
 	print_hex_dump(KERN_ERR, "rng refreshed buf@: ",
 		       DUMP_PREFIX_ADDRESS, 16, 4, bd->buf, RN_BUF_SIZE, 1);
@@ -311,7 +315,7 @@ static int __init caam_rng_init(void)
 	struct device_node *dev_node;
 	struct platform_device *pdev;
 	struct device *ctrldev;
-	void *priv;
+	struct caam_drv_private *priv;
 	int err;
 
 	dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
@@ -338,20 +342,32 @@ static int __init caam_rng_init(void)
 	if (!priv)
 		return -ENODEV;
 
+	/* Check for an instantiated RNG before registration */
+	if (!(rd_reg32(&priv->ctrl->perfmon.cha_num_ls) & CHA_ID_LS_RNG_MASK))
+		return -ENODEV;
+
 	dev = caam_jr_alloc();
 	if (IS_ERR(dev)) {
 		pr_err("Job Ring Device allocation for transform failed\n");
 		return PTR_ERR(dev);
 	}
-	rng_ctx = kmalloc(sizeof(struct caam_rng_ctx), GFP_DMA);
-	if (!rng_ctx)
-		return -ENOMEM;
+	rng_ctx = kmalloc(sizeof(*rng_ctx), GFP_DMA);
+	if (!rng_ctx) {
+		err = -ENOMEM;
+		goto free_caam_alloc;
+	}
 	err = caam_init_rng(rng_ctx, dev);
 	if (err)
-		return err;
+		goto free_rng_ctx;
 
 	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);
+	return err;
 }
 
 module_init(caam_rng_init);