From 0d1d482416002791a705e7acef55edcd989facd2 Mon Sep 17 00:00:00 2001 From: Lars Persson Date: Wed, 23 Jan 2019 12:59:43 +0100 Subject: [PATCH] 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 Signed-off-by: Herbert Xu --- drivers/crypto/axis/artpec6_crypto.c | 11 +++++++---- 1 file 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]; -- 2.30.2