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authorHerbert Xu <herbert@gondor.apana.org.au>2012-06-22 14:08:29 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2012-06-22 14:08:29 +0200
commit398710379f516012c52d2ae396a9ba919bd6a7ab (patch)
treebfdc735759f0f32c883a36a53534a729fdc0f87c /crypto/algboss.c
parentcrypto: serpent-sse2/avx - allow both to be built into kernel (diff)
downloadlinux-398710379f516012c52d2ae396a9ba919bd6a7ab.tar.xz
linux-398710379f516012c52d2ae396a9ba919bd6a7ab.zip
crypto: algapi - Move larval completion into algboss
It has been observed that sometimes the crypto allocation code will get stuck for 60 seconds or multiples thereof. This is usually caused by an algorithm failing to pass the self-test. If an algorithm fails to be constructed, we will immediately notify all larval waiters. However, if it succeeds in construction, but then fails the self-test, we won't notify anyone at all. This patch fixes this by merging the notification in the case where the algorithm fails to be constructed with that of the the case where it pases the self-test. This way regardless of what happens, we'll give the larval waiters an answer. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/algboss.c')
-rw-r--r--crypto/algboss.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/crypto/algboss.c b/crypto/algboss.c
index 791d194958fa..f97027e7d996 100644
--- a/crypto/algboss.c
+++ b/crypto/algboss.c
@@ -11,6 +11,7 @@
*/
#include <crypto/internal/aead.h>
+#include <linux/completion.h>
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/init.h>
@@ -47,6 +48,8 @@ struct cryptomgr_param {
char larval[CRYPTO_MAX_ALG_NAME];
char template[CRYPTO_MAX_ALG_NAME];
+ struct completion *completion;
+
u32 otype;
u32 omask;
};
@@ -66,7 +69,7 @@ static int cryptomgr_probe(void *data)
tmpl = crypto_lookup_template(param->template);
if (!tmpl)
- goto err;
+ goto out;
do {
if (tmpl->create) {
@@ -83,16 +86,10 @@ static int cryptomgr_probe(void *data)
crypto_tmpl_put(tmpl);
- if (err)
- goto err;
-
out:
+ complete(param->completion);
kfree(param);
module_put_and_exit(0);
-
-err:
- crypto_larval_error(param->larval, param->otype, param->omask);
- goto out;
}
static int cryptomgr_schedule_probe(struct crypto_larval *larval)
@@ -192,10 +189,14 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval)
memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
+ param->completion = &larval->completion;
+
thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
if (IS_ERR(thread))
goto err_free_param;
+ wait_for_completion_interruptible(&larval->completion);
+
return NOTIFY_STOP;
err_free_param: