crypto: padlock-aes - Use the correct mask when checking whether copying is required

Masking with PAGE_SIZE is just wrong...

Signed-off-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index a9952b1..84c51e1 100644 (file)
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -236,7 +236,7 @@ static inline void ecb_crypt(const u8 *in, u8 *out, u32 *key,
        /* Padlock in ECB mode fetches at least ecb_fetch_bytes of data.
         * We could avoid some copying here but it's probably not worth it.
         */
-       if (unlikely(((unsigned long)in & PAGE_SIZE) + ecb_fetch_bytes > PAGE_SIZE)) {
+       if (unlikely(((unsigned long)in & ~PAGE_MASK) + ecb_fetch_bytes > PAGE_SIZE)) {
                ecb_crypt_copy(in, out, key, cword, count);
                return;
        }
@@ -248,7 +248,7 @@ static inline u8 *cbc_crypt(const u8 *in, u8 *out, u32 *key,
                            u8 *iv, struct cword *cword, int count)
 {
        /* Padlock in CBC mode fetches at least cbc_fetch_bytes of data. */
-       if (unlikely(((unsigned long)in & PAGE_SIZE) + cbc_fetch_bytes > PAGE_SIZE))
+       if (unlikely(((unsigned long)in & ~PAGE_MASK) + cbc_fetch_bytes > PAGE_SIZE))
                return cbc_crypt_copy(in, out, key, iv, cword, count);
 
        return rep_xcrypt_cbc(in, out, key, iv, cword, count);