crypto: hisilicon-Cap block size at 2^31

hulk inclusion
category: Feature
bugzilla: NA
CVE: NA

The function hisi_acc_create_sg_pool may allocate a block of
memory of size PAGE_SIZE * 2^(MAX_ORDER - 1).  This value may
exceed 2^31 on ia64, which would overflow the u32.
This patch caps it at 2^31.
Signed-off-by: NYu'an Wang <wangyuan46@huawei.com>
Signed-off-by: NZibo Xu <xuzaibo@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/crypto/hisilicon/sgl.c

@@ -9,6 +9,7 @@
 #define HISI_ACC_SGL_NR_MAX		256
 #define HISI_ACC_SGL_ALIGN_SIZE		64
 #define HISI_ACC_MEM_BLOCK_NR		5
+#define HISI_ACC_BLOCK_SIZE_MAX_SHIFT	31
 
 struct acc_hw_sge {
 	dma_addr_t buf;
@@ -66,7 +67,9 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev,
 
 	sgl_size = sizeof(struct acc_hw_sge) * sge_nr +
 		   sizeof(struct hisi_acc_hw_sgl);
-	block_size = PAGE_SIZE * (1 << (MAX_ORDER - 1));
+	block_size = 1 << (PAGE_SHIFT + MAX_ORDER <= 32 ?
+			   PAGE_SHIFT + MAX_ORDER - 1 :
+			   HISI_ACC_BLOCK_SIZE_MAX_SHIFT);
 	sgl_num_per_block = block_size / sgl_size;
 	block_num = count / sgl_num_per_block;
 	remain_sgl = count % sgl_num_per_block;
@@ -230,6 +233,7 @@ hisi_acc_sg_buf_map_to_hw_sgl(struct device *dev,
 		dma_unmap_sg(dev, sgl, sg_n, DMA_BIDIRECTIONAL);
 		return ERR_PTR(-ENOMEM);
 	}
+
 	curr_hw_sgl->entry_length_in_sgl = cpu_to_le16(pool->sge_nr);
 	curr_hw_sge = curr_hw_sgl->sge_entries;