linux-kernel - [PATCH 03/87] ata: libahci: Remove call to memset after dmam_alloc

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Message-Id: <20190627173401.1985-1-huangfq.daxian@gmail.com>
Date:   Fri, 28 Jun 2019 01:34:01 +0800
From:   Fuqian Huang <huangfq.daxian@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Fuqian Huang <huangfq.daxian@...il.com>,
        Jens Axboe <axboe@...nel.dk>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 03/87] ata: libahci: Remove call to memset after dmam_alloc_coherent

In commit af7ddd8a627c
("Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping"),
dmam_alloc_coherent has already zeroed the memory.
So memset is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@...il.com>
---
 drivers/ata/libahci.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 0984c4b76d7e..e4c45d3cca79 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -2365,7 +2365,6 @@ static int ahci_port_start(struct ata_port *ap)
 	mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
 	if (!mem)
 		return -ENOMEM;
-	memset(mem, 0, dma_sz);
 
 	/*
 	 * First item in chunk of DMA memory: 32-slot command table,
-- 
2.11.0