From: James Ralston <james.d.ralston-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>,
Neil Horman <nhorman-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org>
Cc: Seth Heasley
<seth.heasley-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
James Ralston
<james.d.ralston-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 1/1] i2c-ismt: add Initialize DMA buffer code ismt_access()
Date: Tue, 24 Sep 2013 16:47:55 -0700 [thread overview]
Message-ID: <1380066475-2119-1-git-send-email-james.d.ralston@intel.com> (raw)
This patch adds code to Initialize the DMA buffer to compensate for possible hardware data corruption.
Signed-off-by: James Ralston <james.d.ralston-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
drivers/i2c/busses/i2c-ismt.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
index 8ed79a0..d3f30ea 100644
--- a/drivers/i2c/busses/i2c-ismt.c
+++ b/drivers/i2c/busses/i2c-ismt.c
@@ -393,6 +393,9 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
desc = &priv->hw[priv->head];
+ /* Initialize the DMA buffer */
+ memset(priv->dma_buffer, 0, (I2C_SMBUS_BLOCK_MAX+1));
+
/* Initialize the descriptor */
memset(desc, 0, sizeof(struct ismt_desc));
desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);
--
1.7.7.6
next reply other threads:[~2013-09-24 23:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-24 23:47 James Ralston [this message]
[not found] ` <1380066475-2119-1-git-send-email-james.d.ralston-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-26 8:40 ` [PATCH 1/1] i2c-ismt: add Initialize DMA buffer code ismt_access() Wolfram Sang
2013-09-26 14:41 ` Neil Horman
[not found] ` <20130926144115.GB12301-B26myB8xz7F8NnZeBjwnZQMhkBWG/bsMQH7oEaQurus@public.gmane.org>
2013-09-28 13:10 ` Wolfram Sang
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