crypto: axis - give DMA the start of the status buffer

The driver was optimized to only do cache maintenance for the last
word of the dma descriptor status array. Unfortunately an omission
also passed the last word as the address of the array start to the DMA
engine. In most cases this goes unnoticed since the hardware aligns
the address to a 64 byte boundary.

Signed-off-by: Lars Persson <larper@axis.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/crypto/axis/artpec6_crypto.c b/drivers/crypto/axis/artpec6_crypto.c
index da5a73944a78..e8a57b9e1c7a 100644
--- a/drivers/crypto/axis/artpec6_crypto.c
+++ b/drivers/crypto/axis/artpec6_crypto.c
@@ -665,8 +665,8 @@ artpec6_crypto_dma_map_descs(struct artpec6_crypto_req_common *common)
          * to be written.
          */
         return artpec6_crypto_dma_map_single(common,
-                                dma->stat + dma->in_cnt - 1,
-                                sizeof(dma->stat[0]),
+                                dma->stat,
+                                sizeof(dma->stat[0]) * dma->in_cnt,
                                 DMA_BIDIRECTIONAL,
                                 &dma->stat_dma_addr);
 }
@@ -2087,9 +2087,12 @@ static void artpec6_crypto_task(unsigned long data)
         list_for_each_entry_safe(req, n, &ac->pending, list) {
                 struct artpec6_crypto_dma_descriptors *dma = req->dma;
                 u32 stat;
+                dma_addr_t stataddr;
 
-                dma_sync_single_for_cpu(artpec6_crypto_dev, dma->stat_dma_addr,
-                                        sizeof(dma->stat[0]),
+                stataddr = dma->stat_dma_addr + 4 * (req->dma->in_cnt - 1);
+                dma_sync_single_for_cpu(artpec6_crypto_dev,
+                                        stataddr,
+                                        4,
                                         DMA_BIDIRECTIONAL);
 
                 stat = req->dma->stat[req->dma->in_cnt-1];