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authorSebastian Siewior <sebastian@breakpoint.cc>2007-10-07 23:45:10 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:55:50 -0400
commitad5d27899fdbe7a66e57fdf1af883dbd7ff88dac (patch)
tree666a5809fd9a01e0798411b94962903c3431400c /drivers/crypto/padlock-sha.c
parentf8246af005d56b73f4f04304fc5b6fd9878af4ef (diff)
[CRYPTO] sha: Load the SHA[1|256] module by an alias
Loading the crypto algorithm by the alias instead of by module directly has the advantage that all possible implementations of this algorithm are loaded automatically and the crypto API can choose the best one depending on its priority. Additionally it ensures that the generic implementation as well as the HW driver (if available) is loaded in case the HW driver needs the generic version as fallback in corner cases. Also remove the probe for sha1 in padlock's init code. Quote from Herbert: The probe is actually pointless since we can always probe when the algorithm is actually used which does not lead to dead-locks like this. Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/padlock-sha.c')
-rw-r--r--drivers/crypto/padlock-sha.c17
1 files changed, 2 insertions, 15 deletions
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index a781fd23b607..f3857bbbfae3 100644
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -253,19 +253,6 @@ static struct crypto_alg sha256_alg = {
253 } 253 }
254}; 254};
255 255
256static void __init padlock_sha_check_fallbacks(void)
257{
258 if (!crypto_has_hash("sha1", 0, CRYPTO_ALG_ASYNC |
259 CRYPTO_ALG_NEED_FALLBACK))
260 printk(KERN_WARNING PFX
261 "Couldn't load fallback module for sha1.\n");
262
263 if (!crypto_has_hash("sha256", 0, CRYPTO_ALG_ASYNC |
264 CRYPTO_ALG_NEED_FALLBACK))
265 printk(KERN_WARNING PFX
266 "Couldn't load fallback module for sha256.\n");
267}
268
269static int __init padlock_init(void) 256static int __init padlock_init(void)
270{ 257{
271 int rc = -ENODEV; 258 int rc = -ENODEV;
@@ -280,8 +267,6 @@ static int __init padlock_init(void)
280 return -ENODEV; 267 return -ENODEV;
281 } 268 }
282 269
283 padlock_sha_check_fallbacks();
284
285 rc = crypto_register_alg(&sha1_alg); 270 rc = crypto_register_alg(&sha1_alg);
286 if (rc) 271 if (rc)
287 goto out; 272 goto out;
@@ -314,5 +299,7 @@ MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
314MODULE_LICENSE("GPL"); 299MODULE_LICENSE("GPL");
315MODULE_AUTHOR("Michal Ludvig"); 300MODULE_AUTHOR("Michal Ludvig");
316 301
302MODULE_ALIAS("sha1");
303MODULE_ALIAS("sha256");
317MODULE_ALIAS("sha1-padlock"); 304MODULE_ALIAS("sha1-padlock");
318MODULE_ALIAS("sha256-padlock"); 305MODULE_ALIAS("sha256-padlock");