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Subject[PATCH v6 1/7] crypto: caam - use struct hwrng's .init for initialization
Date
Make caamrng code a bit more symmetric by moving initialization code
to .init hook of struct hwrng.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia Geantă <horia.geanta@nxp.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Iuliana Prodan <iuliana.prodan@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-imx@nxp.com
---
drivers/crypto/caam/caamrng.c | 47 ++++++++++++++++++-----------------
1 file changed, 24 insertions(+), 23 deletions(-)

diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index e8baacaabe07..1ce7fbd29e85 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -256,6 +256,7 @@ static void caam_cleanup(struct hwrng *rng)
}

rng_unmap_ctx(rng_ctx);
+ caam_jr_free(rng_ctx->jrdev);
}

static int caam_init_buf(struct caam_rng_ctx *ctx, int buf_id)
@@ -274,28 +275,43 @@ static int caam_init_buf(struct caam_rng_ctx *ctx, int buf_id)
return 0;
}

-static int caam_init_rng(struct caam_rng_ctx *ctx, struct device *jrdev)
+static int caam_init(struct hwrng *rng)
{
+ struct caam_rng_ctx *ctx = rng_ctx;
int err;

- ctx->jrdev = jrdev;
+ ctx->jrdev = caam_jr_alloc();
+ err = PTR_ERR_OR_ZERO(ctx->jrdev);
+ if (err) {
+ pr_err("Job Ring Device allocation for transform failed\n");
+ return err;
+ }

err = rng_create_sh_desc(ctx);
if (err)
- return err;
+ goto free_jrdev;

ctx->current_buf = 0;
ctx->cur_buf_idx = 0;

err = caam_init_buf(ctx, 0);
if (err)
- return err;
+ goto free_jrdev;
+
+ err = caam_init_buf(ctx, 1);
+ if (err)
+ goto free_jrdev;

- return caam_init_buf(ctx, 1);
+ return 0;
+
+free_jrdev:
+ caam_jr_free(ctx->jrdev);
+ return err;
}

static struct hwrng caam_rng = {
.name = "rng-caam",
+ .init = caam_init,
.cleanup = caam_cleanup,
.read = caam_read,
};
@@ -305,14 +321,12 @@ void caam_rng_exit(void)
if (!init_done)
return;

- caam_jr_free(rng_ctx->jrdev);
hwrng_unregister(&caam_rng);
kfree(rng_ctx);
}

int caam_rng_init(struct device *ctrldev)
{
- struct device *dev;
u32 rng_inst;
struct caam_drv_private *priv = dev_get_drvdata(ctrldev);
int err;
@@ -328,21 +342,11 @@ int caam_rng_init(struct device *ctrldev)
if (!rng_inst)
return 0;

- 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(*rng_ctx), GFP_DMA | GFP_KERNEL);
- if (!rng_ctx) {
- err = -ENOMEM;
- goto free_caam_alloc;
- }
- err = caam_init_rng(rng_ctx, dev);
- if (err)
- goto free_rng_ctx;
+ if (!rng_ctx)
+ return -ENOMEM;

- dev_info(dev, "registering rng-caam\n");
+ dev_info(ctrldev, "registering rng-caam\n");

err = hwrng_register(&caam_rng);
if (!err) {
@@ -350,9 +354,6 @@ int caam_rng_init(struct device *ctrldev)
return err;
}

-free_rng_ctx:
kfree(rng_ctx);
-free_caam_alloc:
- caam_jr_free(dev);
return err;
}
--
2.21.0
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