linux-kernel - Re: [PATCH 1/1] i2c-ismt: add Initialize DMA buffer code ismt

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Date:	Thu, 26 Sep 2013 10:41:15 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	James Ralston <james.d.ralston@...el.com>,
	Seth Heasley <seth.heasley@...el.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] i2c-ismt: add Initialize DMA buffer code
 ismt_access()

On Thu, Sep 26, 2013 at 10:40:32AM +0200, Wolfram Sang wrote:
> On Tue, Sep 24, 2013 at 04:47:55PM -0700, James Ralston wrote:
> > This patch adds code to Initialize the DMA buffer to compensate for possible hardware data corruption.
> 
> Take care of the line width here.
> 
> > Signed-off-by: James Ralston <james.d.ralston@...el.com>
> > ---
> >  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));
> 
> sizeof()?
> 
Agreed.
Neil

> > +
> >  	/* Initialize the descriptor */
> >  	memset(desc, 0, sizeof(struct ismt_desc));
> >  	desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);
> > -- 
> > 1.7.7.6
> > 


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