linux-kernel - [PATCH] arch/powerpc: Use dma_zalloc

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Date:   Mon, 5 Nov 2018 07:52:48 +0530
From:   Sabyasachi Gupta <sabyasachi.linux@...il.com>
To:     benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au
Cc:     jrdr.linux@...il.com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, brajeswar.linux@...il.com
Subject: [PATCH] arch/powerpc: Use dma_zalloc_coherent

Replaced dma_alloc_coherent + memset with dma_zalloc_coherent

Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@...il.com>
---
 arch/powerpc/sysdev/fsl_rmu.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/powerpc/sysdev/fsl_rmu.c b/arch/powerpc/sysdev/fsl_rmu.c
index 88b35a3d..8b0ebf3 100644
--- a/arch/powerpc/sysdev/fsl_rmu.c
+++ b/arch/powerpc/sysdev/fsl_rmu.c
@@ -756,15 +756,13 @@ fsl_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
 	}
 
 	/* Initialize outbound message descriptor ring */
-	rmu->msg_tx_ring.virt = dma_alloc_coherent(priv->dev,
+	rmu->msg_tx_ring.virt = dma_zalloc_coherent(priv->dev,
 				rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
 				&rmu->msg_tx_ring.phys, GFP_KERNEL);
 	if (!rmu->msg_tx_ring.virt) {
 		rc = -ENOMEM;
 		goto out_dma;
 	}
-	memset(rmu->msg_tx_ring.virt, 0,
-			rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
 	rmu->msg_tx_ring.tx_slot = 0;
 
 	/* Point dequeue/enqueue pointers at first entry in ring */
-- 
2.7.4