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crypto: caam - unregister algorithm only if the registration succeeded 

To know if a registration succeeded added a new struct,
caam_akcipher_alg, that keeps, also, the registration status.
This status is updated in caam_pkc_init and verified in
caam_pkc_exit to unregister an algorithm.

Fixes: 1b46c90c8e ("crypto: caam - convert top level drivers to libraries")
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geanta <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Iuliana Prodan 2019-07-31 16:08:14 +03:00 committed by Herbert Xu
parent 4e3a61c55b
commit 58068cfc81
1 changed files with 30 additions and 19 deletions
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19
drivers/crypto/caam/caampkc.c
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@ -35,6 +35,11 @@ static u8 *zero_buffer;
*/
static bool init_done;
struct caam_akcipher_alg {
struct akcipher_alg akcipher;
bool registered;
};
static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc,
struct akcipher_request *req)
{
@ -1058,7 +1063,8 @@ static void caam_rsa_exit_tfm(struct crypto_akcipher *tfm)
caam_jr_free(ctx->dev);
}
static struct akcipher_alg caam_rsa = {
static struct caam_akcipher_alg caam_rsa = {
.akcipher = {
.encrypt = caam_rsa_enc,
.decrypt = caam_rsa_dec,
.set_pub_key = caam_rsa_set_pub_key,
@ -1074,6 +1080,7 @@ static struct akcipher_alg caam_rsa = {
.cra_module = THIS_MODULE,
.cra_ctxsize = sizeof(struct caam_rsa_ctx),
},
}
};
/* Public Key Cryptography module initialization handler */
@ -1101,13 +1108,15 @@ int caam_pkc_init(struct device *ctrldev)
if (!zero_buffer)
return -ENOMEM;
err = crypto_register_akcipher(&caam_rsa);
err = crypto_register_akcipher(&caam_rsa.akcipher);
if (err) {
kfree(zero_buffer);
dev_warn(ctrldev, "%s alg registration failed\n",
caam_rsa.base.cra_driver_name);
caam_rsa.akcipher.base.cra_driver_name);
} else {
init_done = true;
caam_rsa.registered = true;
dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n");
}
@ -1119,6 +1128,8 @@ void caam_pkc_exit(void)
if (!init_done)
return;
if (caam_rsa.registered)
crypto_unregister_akcipher(&caam_rsa.akcipher);
kfree(zero_buffer);
crypto_unregister_akcipher(&caam_rsa);
}