linux-kernel - [PATCH resend 4/7] carma-fpga: pass correct flags to ->device_prep_dma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <1354705845-29439-5-git-send-email-b.zolnierkie@samsung.com>
Date:	Wed, 05 Dec 2012 12:10:42 +0100
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	vinod.koul@...el.com
Cc:	linux-kernel@...r.kernel.org, djbw@...com, dwmw2@...radead.org,
	hskinnemoen@...il.com, iws@...o.caltech.edu, vipin.kumar@...com,
	t.figa@...sung.com, kyungmin.park@...sung.com,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH resend 4/7] carma-fpga: pass correct flags to
 ->device_prep_dma_memcpy()

DMA unmapping is handled by a driver so tell fsldma.c driver
(which is the DMA engine driver used by carma-fpga) to skip
unmapping destination and source buffers.

Acked-by: Ira W. Snyder <iws@...o.caltech.edu>
Acked-by: Dan Williams <djbw@...com>
Reviewed-by: Tomasz Figa <t.figa@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/misc/carma/carma-fpga.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/carma/carma-fpga.c b/drivers/misc/carma/carma-fpga.c
index 8835eab..6b43f8c 100644
--- a/drivers/misc/carma/carma-fpga.c
+++ b/drivers/misc/carma/carma-fpga.c
@@ -631,6 +631,8 @@ static int data_submit_dma(struct fpga_device *priv, struct data_buf *buf)
 	struct dma_async_tx_descriptor *tx;
 	dma_cookie_t cookie;
 	dma_addr_t dst, src;
+	unsigned long dma_flags = DMA_COMPL_SKIP_DEST_UNMAP |
+				  DMA_COMPL_SKIP_SRC_UNMAP;
 
 	dst_sg = buf->vb.sglist;
 	dst_nents = buf->vb.sglen;
@@ -666,7 +668,7 @@ static int data_submit_dma(struct fpga_device *priv, struct data_buf *buf)
 	src = SYS_FPGA_BLOCK;
 	tx = chan->device->device_prep_dma_memcpy(chan, dst, src,
 						  REG_BLOCK_SIZE,
-						  0);
+						  dma_flags);
 	if (!tx) {
 		dev_err(priv->dev, "unable to prep SYS-FPGA DMA\n");
 		return -ENOMEM;
-- 
1.8.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/