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Crypto/chcr: Checking cra_refcnt before unregistering the algorithms 

This patch puts a check for algorithm unregister, to avoid removal of
driver if the algorithm is under use.

Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ayush Sawal 2020-06-10 02:54:32 +05:30 committed by David S. Miller
parent fb90a1c85d
commit 8b9914cd72
1 changed files with 14 additions and 4 deletions
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18
drivers/crypto/chelsio/chcr_algo.c
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@ -4391,22 +4391,32 @@ static int chcr_unregister_alg(void)
for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) {
case CRYPTO_ALG_TYPE_SKCIPHER:
if (driver_algs[i].is_registered)
if (driver_algs[i].is_registered && refcount_read(
&driver_algs[i].alg.skcipher.base.cra_refcnt)
== 1) {
crypto_unregister_skcipher(
&driver_algs[i].alg.skcipher);
driver_algs[i].is_registered = 0;
}
break;
case CRYPTO_ALG_TYPE_AEAD:
if (driver_algs[i].is_registered)
if (driver_algs[i].is_registered && refcount_read(
&driver_algs[i].alg.aead.base.cra_refcnt) == 1) {
crypto_unregister_aead(
&driver_algs[i].alg.aead);
driver_algs[i].is_registered = 0;
}
break;
case CRYPTO_ALG_TYPE_AHASH:
if (driver_algs[i].is_registered)
if (driver_algs[i].is_registered && refcount_read(
&driver_algs[i].alg.hash.halg.base.cra_refcnt)
== 1) {
crypto_unregister_ahash(
&driver_algs[i].alg.hash);
driver_algs[i].is_registered = 0;
}
break;
}
driver_algs[i].is_registered = 0;
}
return 0;
}