1 files changed, 37 insertions, 27 deletions

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c
index 8625e299d445..2e2c2ac53609 100644
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -34,19 +34,6 @@
 static DEFINE_MUTEX(algs_lock);
 static unsigned int active_devs;
 
-struct qat_alg_buf {
-	u32 len;
-	u32 resrvd;
-	u64 addr;
-} __packed;
-
-struct qat_alg_buf_list {
-	u64 resrvd;
-	u32 num_bufs;
-	u32 num_mapped_bufs;
-	struct qat_alg_buf bufers[];
-} __packed __aligned(64);
-
 /* Common content descriptor */
 struct qat_alg_cd {
 	union {
@@ -644,7 +631,10 @@ static void qat_alg_free_bufl(struct qat_crypto_instance *inst,
 				 bl->bufers[i].len, DMA_BIDIRECTIONAL);
 
 	dma_unmap_single(dev, blp, sz, DMA_TO_DEVICE);
-	kfree(bl);
+
+	if (!qat_req->buf.sgl_src_valid)
+		kfree(bl);
+
 	if (blp != blpout) {
 		/* If out of place operation dma unmap only data */
 		int bufless = blout->num_bufs - blout->num_mapped_bufs;
@@ -655,7 +645,9 @@ static void qat_alg_free_bufl(struct qat_crypto_instance *inst,
 					 DMA_BIDIRECTIONAL);
 		}
 		dma_unmap_single(dev, blpout, sz_out, DMA_TO_DEVICE);
-		kfree(blout);
+
+		if (!qat_req->buf.sgl_dst_valid)
+			kfree(blout);
 	}
 }
 
@@ -672,15 +664,24 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
 	dma_addr_t blp = DMA_MAPPING_ERROR;
 	dma_addr_t bloutp = DMA_MAPPING_ERROR;
 	struct scatterlist *sg;
-	size_t sz_out, sz = struct_size(bufl, bufers, n + 1);
+	size_t sz_out, sz = struct_size(bufl, bufers, n);
+	int node = dev_to_node(&GET_DEV(inst->accel_dev));
 
 	if (unlikely(!n))
 		return -EINVAL;
 
-	bufl = kzalloc_node(sz, GFP_ATOMIC,
-			    dev_to_node(&GET_DEV(inst->accel_dev)));
-	if (unlikely(!bufl))
-		return -ENOMEM;
+	qat_req->buf.sgl_src_valid = false;
+	qat_req->buf.sgl_dst_valid = false;
+
+	if (n > QAT_MAX_BUFF_DESC) {
+		bufl = kzalloc_node(sz, GFP_ATOMIC, node);
+		if (unlikely(!bufl))
+			return -ENOMEM;
+	} else {
+		bufl = &qat_req->buf.sgl_src.sgl_hdr;
+		memset(bufl, 0, sizeof(struct qat_alg_buf_list));
+		qat_req->buf.sgl_src_valid = true;
+	}
 
 	for_each_sg(sgl, sg, n, i)
 		bufl->bufers[i].addr = DMA_MAPPING_ERROR;
@@ -711,12 +712,18 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
 		struct qat_alg_buf *bufers;
 
 		n = sg_nents(sglout);
-		sz_out = struct_size(buflout, bufers, n + 1);
+		sz_out = struct_size(buflout, bufers, n);
 		sg_nctr = 0;
-		buflout = kzalloc_node(sz_out, GFP_ATOMIC,
-				       dev_to_node(&GET_DEV(inst->accel_dev)));
-		if (unlikely(!buflout))
-			goto err_in;
+
+		if (n > QAT_MAX_BUFF_DESC) {
+			buflout = kzalloc_node(sz_out, GFP_ATOMIC, node);
+			if (unlikely(!buflout))
+				goto err_in;
+		} else {
+			buflout = &qat_req->buf.sgl_dst.sgl_hdr;
+			memset(buflout, 0, sizeof(struct qat_alg_buf_list));
+			qat_req->buf.sgl_dst_valid = true;
+		}
 
 		bufers = buflout->bufers;
 		for_each_sg(sglout, sg, n, i)
@@ -761,7 +768,9 @@ err_out:
 			dma_unmap_single(dev, buflout->bufers[i].addr,
 					 buflout->bufers[i].len,
 					 DMA_BIDIRECTIONAL);
-	kfree(buflout);
+
+	if (!qat_req->buf.sgl_dst_valid)
+		kfree(buflout);
 
 err_in:
 	if (!dma_mapping_error(dev, blp))
@@ -774,7 +783,8 @@ err_in:
 					 bufl->bufers[i].len,
 					 DMA_BIDIRECTIONAL);
 
-	kfree(bufl);
+	if (!qat_req->buf.sgl_src_valid)
+		kfree(bufl);
 
 	dev_err(dev, "Failed to map buf for dma\n");
 	return -ENOMEM;