crypto: api - Fix module load deadlock with fallback algorithms

[linux-2.6-omap-h63xx.git] / crypto / api.c

diff --git a/crypto/api.c b/crypto/api.c
index efe77df6863f4378f4f0da414591f940870b76ea..38a2bc02a98c7f6648f7a7a3388c6182b88c07f9 100644 (file)
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -215,8 +215,19 @@ struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask)
        mask &= ~(CRYPTO_ALG_LARVAL | CRYPTO_ALG_DEAD);
        type &= mask;
 
-       alg = try_then_request_module(crypto_alg_lookup(name, type, mask),
-                                     name);
+       alg = crypto_alg_lookup(name, type, mask);
+       if (!alg) {
+               char tmp[CRYPTO_MAX_ALG_NAME];
+
+               request_module(name);
+
+               if (!((type ^ CRYPTO_ALG_NEED_FALLBACK) & mask) &&
+                   snprintf(tmp, sizeof(tmp), "%s-all", name) < sizeof(tmp))
+                       request_module(tmp);
+
+               alg = crypto_alg_lookup(name, type, mask);
+       }
+
        if (alg)
                return crypto_is_larval(alg) ? crypto_larval_wait(alg) : alg;