@@ -1279,45 +1279,45 @@ static void gcm_process_assoc(const struct aes_gcm_key *key, u8 ghash_acc[16],
memset(ghash_acc, 0, 16);
scatterwalk_start(&walk, sg_src);
while (assoclen) {
- unsigned int len_this_page = scatterwalk_clamp(&walk, assoclen);
- void *mapped = scatterwalk_map(&walk);
- const void *src = mapped;
+ unsigned int orig_len_this_step;
+ const u8 *orig_src = scatterwalk_next(&walk, assoclen,
+ &orig_len_this_step);
+ unsigned int len_this_step = orig_len_this_step;
unsigned int len;
+ const u8 *src = orig_src;
- assoclen -= len_this_page;
- scatterwalk_advance(&walk, len_this_page);
if (unlikely(pos)) {
- len = min(len_this_page, 16 - pos);
+ len = min(len_this_step, 16 - pos);
memcpy(&buf[pos], src, len);
pos += len;
src += len;
- len_this_page -= len;
+ len_this_step -= len;
if (pos < 16)
goto next;
aes_gcm_aad_update(key, ghash_acc, buf, 16, flags);
pos = 0;
}
- len = len_this_page;
+ len = len_this_step;
if (unlikely(assoclen)) /* Not the last segment yet? */
len = round_down(len, 16);
aes_gcm_aad_update(key, ghash_acc, src, len, flags);
src += len;
- len_this_page -= len;
- if (unlikely(len_this_page)) {
- memcpy(buf, src, len_this_page);
- pos = len_this_page;
+ len_this_step -= len;
+ if (unlikely(len_this_step)) {
+ memcpy(buf, src, len_this_step);
+ pos = len_this_step;
}
next:
- scatterwalk_unmap(mapped);
- scatterwalk_pagedone(&walk, 0, assoclen);
+ scatterwalk_done_src(&walk, orig_src, orig_len_this_step);
if (need_resched()) {
kernel_fpu_end();
kernel_fpu_begin();
}
+ assoclen -= orig_len_this_step;
}
if (unlikely(pos))
aes_gcm_aad_update(key, ghash_acc, buf, pos, flags);
}