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

[linux-drm-fsl-dcu.git] / drivers / crypto / tegra-aes.c

diff --git a/drivers/crypto/tegra-aes.c b/drivers/crypto/tegra-aes.c
index fa05e3c329bdd44a522a922a1d12e87a54393309..060eecc5dbc31b24bf0c05301b37192da7e36dff 100644 (file)
--- a/drivers/crypto/tegra-aes.c
+++ b/drivers/crypto/tegra-aes.c
@@ -27,6 +27,8 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/errno.h>
@@ -199,8 +201,6 @@ static void aes_workqueue_handler(struct work_struct *work);
 static DECLARE_WORK(aes_work, aes_workqueue_handler);
 static struct workqueue_struct *aes_wq;
 
-extern unsigned long long tegra_chip_uid(void);
-
 static inline u32 aes_readl(struct tegra_aes_dev *dd, u32 offset)
 {
        return readl(dd->io_base + offset);
@@ -713,13 +713,12 @@ static int tegra_aes_rng_reset(struct crypto_rng *tfm, u8 *seed,
        struct tegra_aes_dev *dd = aes_dev;
        struct tegra_aes_ctx *ctx = &rng_ctx;
        struct tegra_aes_slot *key_slot;
-       struct timespec ts;
        int ret = 0;
-       u64 nsec, tmp[2];
+       u8 tmp[16]; /* 16 bytes = 128 bits of entropy */
        u8 *dt;
 
        if (!ctx || !dd) {
-               dev_err(dd->dev, "ctx=0x%x, dd=0x%x\n",
+               pr_err("ctx=0x%x, dd=0x%x\n",
                        (unsigned int)ctx, (unsigned int)dd);
                return -EINVAL;
        }
@@ -778,14 +777,8 @@ static int tegra_aes_rng_reset(struct crypto_rng *tfm, u8 *seed,
        if (dd->ivlen >= (2 * DEFAULT_RNG_BLK_SZ + AES_KEYSIZE_128)) {
                dt = dd->iv + DEFAULT_RNG_BLK_SZ + AES_KEYSIZE_128;
        } else {
-               getnstimeofday(&ts);
-               nsec = timespec_to_ns(&ts);
-               do_div(nsec, 1000);
-               nsec ^= dd->ctr << 56;
-               dd->ctr++;
-               tmp[0] = nsec;
-               tmp[1] = tegra_chip_uid();
-               dt = (u8 *)tmp;
+               get_random_bytes(tmp, sizeof(tmp));
+               dt = tmp;
        }
        memcpy(dd->dt, dt, DEFAULT_RNG_BLK_SZ);
 
@@ -804,7 +797,7 @@ static int tegra_aes_cra_init(struct crypto_tfm *tfm)
        return 0;
 }
 
-void tegra_aes_cra_exit(struct crypto_tfm *tfm)
+static void tegra_aes_cra_exit(struct crypto_tfm *tfm)
 {
        struct tegra_aes_ctx *ctx =
                crypto_ablkcipher_ctx((struct crypto_ablkcipher *)tfm);
@@ -924,7 +917,7 @@ static int tegra_aes_probe(struct platform_device *pdev)
        }
 
        /* Initialize the vde clock */
-       dd->aes_clk = clk_get(dev, "vde");
+       dd->aes_clk = devm_clk_get(dev, "vde");
        if (IS_ERR(dd->aes_clk)) {
                dev_err(dev, "iclock intialization failed.\n");
                err = -ENODEV;
@@ -1033,8 +1026,6 @@ out:
        if (dd->buf_out)
                dma_free_coherent(dev, AES_HW_DMA_BUFFER_SIZE_BYTES,
                        dd->buf_out, dd->dma_buf_out);
-       if (!IS_ERR(dd->aes_clk))
-               clk_put(dd->aes_clk);
        if (aes_wq)
                destroy_workqueue(aes_wq);
        spin_lock(&list_lock);
@@ -1068,7 +1059,6 @@ static int tegra_aes_remove(struct platform_device *pdev)
                          dd->buf_in, dd->dma_buf_in);
        dma_free_coherent(dev, AES_HW_DMA_BUFFER_SIZE_BYTES,
                          dd->buf_out, dd->dma_buf_out);
-       clk_put(dd->aes_clk);
        aes_dev = NULL;
 
        return 0;