crypto: qat - fix unmap invalid dma address

'dma_mapping_error' return a negative value if 'dma_addr' is equal to
'DMA_MAPPING_ERROR' not zero, so fix initialization of 'dma_addr'.

Signed-off-by: Hui Tang <tanghui20@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c
index ff78c73..ea1c689 100644 (file)
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -719,7 +719,7 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
        struct qat_alg_buf_list *bufl;
        struct qat_alg_buf_list *buflout = NULL;
        dma_addr_t blp;
-       dma_addr_t bloutp = 0;
+       dma_addr_t bloutp;
        struct scatterlist *sg;
        size_t sz_out, sz = struct_size(bufl, bufers, n + 1);
 
@@ -731,6 +731,9 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
        if (unlikely(!bufl))
                return -ENOMEM;
 
+       for_each_sg(sgl, sg, n, i)
+               bufl->bufers[i].addr = DMA_MAPPING_ERROR;
+
        blp = dma_map_single(dev, bufl, sz, DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev, blp)))
                goto err_in;
@@ -764,10 +767,14 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
                                       dev_to_node(&GET_DEV(inst->accel_dev)));
                if (unlikely(!buflout))
                        goto err_in;
+
+               bufers = buflout->bufers;
+               for_each_sg(sglout, sg, n, i)
+                       bufers[i].addr = DMA_MAPPING_ERROR;
+
                bloutp = dma_map_single(dev, buflout, sz_out, DMA_TO_DEVICE);
                if (unlikely(dma_mapping_error(dev, bloutp)))
                        goto err_out;
-               bufers = buflout->bufers;
                for_each_sg(sglout, sg, n, i) {
                        int y = sg_nctr;