From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Thomas Subject: [PATCH v2 3/7] crypto: img-hash - Reconfigure DMA Burst length Date: Fri, 5 Aug 2016 14:00:16 +0100 Message-ID: <1470402020-10774-4-git-send-email-will.thomas@imgtec.com> References: <1470402020-10774-1-git-send-email-will.thomas@imgtec.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , Will Thomas To: Return-path: Received: from mailapp01.imgtec.com ([195.59.15.196]:25560 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759692AbcHENIN (ORCPT ); Fri, 5 Aug 2016 09:08:13 -0400 In-Reply-To: <1470402020-10774-1-git-send-email-will.thomas@imgtec.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: Burst length of 16 drives the hash accelerator out of spec and causes stability issues in some cases. Reduce this to stop data being lost. Signed-off-by: Will Thomas Reviewed-by: James Hartley --- drivers/crypto/img-hash.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c index de2b86e..f8abbe3 100644 --- a/drivers/crypto/img-hash.c +++ b/drivers/crypto/img-hash.c @@ -71,6 +71,7 @@ #define DRIVER_FLAGS_MD5 BIT(21) #define IMG_HASH_QUEUE_LENGTH 20 +#define IMG_HASH_DMA_BURST 4 #define IMG_HASH_DMA_THRESHOLD 64 #ifdef __LITTLE_ENDIAN @@ -342,7 +343,7 @@ static int img_hash_dma_init(struct img_hash_dev *hdev) dma_conf.direction = DMA_MEM_TO_DEV; dma_conf.dst_addr = hdev->bus_addr; dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - dma_conf.dst_maxburst = 16; + dma_conf.dst_maxburst = IMG_HASH_DMA_BURST; dma_conf.device_fc = false; err = dmaengine_slave_config(hdev->dma_lch, &dma_conf); -- 2.1.4