diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/qat/qat_common/qat_algs.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c index 9e9619cd4a79..5b35e5d2231d 100644 --- a/drivers/crypto/qat/qat_common/qat_algs.c +++ b/drivers/crypto/qat/qat_common/qat_algs.c @@ -73,7 +73,8 @@ ICP_QAT_HW_CIPHER_KEY_CONVERT, \ ICP_QAT_HW_CIPHER_DECRYPT) -static atomic_t active_dev; +static DEFINE_MUTEX(algs_lock); +static unsigned int active_devs; struct qat_alg_buf { uint32_t len; @@ -955,27 +956,34 @@ static struct crypto_alg qat_algs[] = { { int qat_algs_register(void) { - if (atomic_add_return(1, &active_dev) == 1) { + int ret = 0; + + mutex_lock(&algs_lock); + if (++active_devs == 1) { int i; for (i = 0; i < ARRAY_SIZE(qat_algs); i++) qat_algs[i].cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC; - return crypto_register_algs(qat_algs, ARRAY_SIZE(qat_algs)); + ret = crypto_register_algs(qat_algs, ARRAY_SIZE(qat_algs)); } - return 0; + mutex_unlock(&algs_lock); + return ret; } int qat_algs_unregister(void) { - if (atomic_sub_return(1, &active_dev) == 0) - return crypto_unregister_algs(qat_algs, ARRAY_SIZE(qat_algs)); - return 0; + int ret = 0; + + mutex_lock(&algs_lock); + if (--active_devs == 0) + ret = crypto_unregister_algs(qat_algs, ARRAY_SIZE(qat_algs)); + mutex_unlock(&algs_lock); + return ret; } int qat_algs_init(void) { - atomic_set(&active_dev, 0); crypto_get_default_rng(); return 0; } |