linux-kernel - [PATCH v3 04/24] dmaengine: qcom_hidma: Remove call to memset after dmam_alloc

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Date:   Mon, 15 Jul 2019 11:17:23 +0800
From:   Fuqian Huang <huangfq.daxian@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Sinan Kaya <okaya@...nel.org>, Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Fuqian Huang <huangfq.daxian@...il.com>
Subject: [PATCH v3 04/24] dmaengine: qcom_hidma: Remove call to memset after dmam_alloc_coherent

In commit 518a2f1925c3
("dma-mapping: zero memory returned from dma_alloc_*"),
dma_alloc_coherent has already zeroed the memory.
So memset is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@...il.com>
---
Changes in v3:
  - Use actual commit rather than the merge commit in the commit message

 drivers/dma/qcom/hidma_ll.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c
index 5bf8b145c427..bb4471e84e48 100644
--- a/drivers/dma/qcom/hidma_ll.c
+++ b/drivers/dma/qcom/hidma_ll.c
@@ -749,7 +749,6 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres,
 	if (!lldev->tre_ring)
 		return NULL;
 
-	memset(lldev->tre_ring, 0, (HIDMA_TRE_SIZE + 1) * nr_tres);
 	lldev->tre_ring_size = HIDMA_TRE_SIZE * nr_tres;
 	lldev->nr_tres = nr_tres;
 
@@ -769,7 +768,6 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres,
 	if (!lldev->evre_ring)
 		return NULL;
 
-	memset(lldev->evre_ring, 0, (HIDMA_EVRE_SIZE + 1) * nr_tres);
 	lldev->evre_ring_size = HIDMA_EVRE_SIZE * nr_tres;
 
 	/* the EVRE ring has to be EVRE_SIZE aligned */
-- 
2.11.0