crypto/qat: optimise check for chained mbufs

To detect if sgl, use nb_segs > 1, instead of checking for next pointer,
as nb_segs is in first cache-line while next is in second cache-line.

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>

diff --git a/drivers/crypto/qat/qat_sym.c b/drivers/crypto/qat/qat_sym.c
index cecced6..25b6dd5 100644 (file)
--- a/drivers/crypto/qat/qat_sym.c
+++ b/drivers/crypto/qat/qat_sym.c
@@ -428,7 +428,8 @@ qat_sym_build_request(void *in_op, uint8_t *out_msg,
                min_ofs = op->sym->aead.data.offset;
        }
 
-       if (op->sym->m_src->next || (op->sym->m_dst && op->sym->m_dst->next))
+       if (op->sym->m_src->nb_segs > 1 ||
+                       (op->sym->m_dst && op->sym->m_dst->nb_segs > 1))
                do_sgl = 1;
 
        /* adjust for chain case */