From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Ralston Subject: [PATCH 1/1] i2c-ismt: add Initialize DMA buffer code ismt_access() Date: Tue, 24 Sep 2013 16:47:55 -0700 Message-ID: <1380066475-2119-1-git-send-email-james.d.ralston@intel.com> Return-path: Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Wolfram Sang , Neil Horman Cc: Seth Heasley , James Ralston , linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-i2c@vger.kernel.org This patch adds code to Initialize the DMA buffer to compensate for possible hardware data corruption. Signed-off-by: James Ralston --- 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