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From: Guanhua Gao <guanhua.gao@nxp.com>
To: Dan Williams <dan.j.williams@intel.com>, Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
	Guanhua Gao <guanhua.gao@nxp.com>
Subject: [PATCH 1/2] dmaengine: fsl-dpaa2-qdma: Fix the size of dma pools
Date: Thu, 17 Dec 2020 17:23:27 +0800	[thread overview]
Message-ID: <20201217092327.11473-1-guanhua.gao@nxp.com> (raw)

In case of long format of qDMA command descriptor, there are one frame
descriptor, three entries in the frame list and two data entries. So the
size of dma_pool_create for these three fields should be the same with
the total size of entries respectively, or the contents may be overwritten
by the next allocated descriptor.

Signed-off-by: Guanhua Gao <guanhua.gao@nxp.com>
---
 drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
index 4ec909e..bc5baa6 100644
--- a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
+++ b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
@@ -38,15 +38,17 @@ static int dpaa2_qdma_alloc_chan_resources(struct dma_chan *chan)
 	if (!dpaa2_chan->fd_pool)
 		goto err;
 
-	dpaa2_chan->fl_pool = dma_pool_create("fl_pool", dev,
-					      sizeof(struct dpaa2_fl_entry),
-					      sizeof(struct dpaa2_fl_entry), 0);
+	dpaa2_chan->fl_pool =
+		dma_pool_create("fl_pool", dev,
+				 sizeof(struct dpaa2_fl_entry) * 3,
+				 sizeof(struct dpaa2_fl_entry), 0);
+
 	if (!dpaa2_chan->fl_pool)
 		goto err_fd;
 
 	dpaa2_chan->sdd_pool =
 		dma_pool_create("sdd_pool", dev,
-				sizeof(struct dpaa2_qdma_sd_d),
+				sizeof(struct dpaa2_qdma_sd_d) * 2,
 				sizeof(struct dpaa2_qdma_sd_d), 0);
 	if (!dpaa2_chan->sdd_pool)
 		goto err_fl;
-- 
2.7.4


             reply	other threads:[~2020-12-17  9:19 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-17  9:23 Guanhua Gao [this message]
2021-02-01 10:00 ` [PATCH 1/2] dmaengine: fsl-dpaa2-qdma: Fix the size of dma pools Vinod Koul

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