crypto: algif - Mark sgl end at the end of data
algif_skcipher sends 127 sgl buffers for encryption regardless of how
many buffers acctually have data to process, where the few first with
valid len and the rest with zero len. This is not very eficient.
This patch marks the last one with data as the last one to process.
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index c12207c..38a6757 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -330,6 +330,7 @@
sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
sg = sgl->sg;
+ sg_unmark_end(sg + sgl->cur);
do {
i = sgl->cur;
plen = min_t(int, len, PAGE_SIZE);
@@ -355,6 +356,9 @@
sgl->cur++;
} while (len && sgl->cur < MAX_SGL_ENTS);
+ if (!size)
+ sg_mark_end(sg + sgl->cur - 1);
+
ctx->merge = plen & (PAGE_SIZE - 1);
}
@@ -401,6 +405,10 @@
ctx->merge = 0;
sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
+ if (sgl->cur)
+ sg_unmark_end(sgl->sg + sgl->cur - 1);
+
+ sg_mark_end(sgl->sg + sgl->cur);
get_page(page);
sg_set_page(sgl->sg + sgl->cur, page, size, offset);
sgl->cur++;