Preston_PLB
/
kernel-aes67
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

crypto: talitos - remove unnecessary alignmask for ahashes 

The crypto API's support for alignmasks for ahash algorithms is nearly
useless, as its only effect is to cause the API to align the key and
result buffers.  The drivers that happen to be specifying an alignmask
for ahash rarely actually need it.  When they do, it's easily fixable,
especially considering that these buffers cannot be used for DMA.

In preparation for removing alignmask support from ahash, this patch
makes the talitos driver no longer use it.  This driver didn't actually
rely on it; it only writes to the result buffer in
common_nonsnoop_hash_unmap(), simply using memcpy().  And this driver's
"ahash_setkey()" function does not assume any alignment for the key
buffer.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2023-10-22 01:10:39 -07:00 committed by Herbert Xu
parent 13d13bba26
commit 492444c3ed
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/crypto/talitos.c
View File

@ -3257,7 +3257,7 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
alg->cra_priority = t_alg->algt.priority;
else
alg->cra_priority = TALITOS_CRA_PRIORITY;
if (has_ftr_sec1(priv))
if (has_ftr_sec1(priv) && t_alg->algt.type != CRYPTO_ALG_TYPE_AHASH)
alg->cra_alignmask = 3;
else
alg->cra_alignmask = 0;