On Tue, Sep 16, 2014 at 05:21:04PM +0800, Fan Du wrote:
> In block write mode, when encapsulating dma_buffer, first element is
> 'command', the rest is data buffer, so only copy actual data buffer
> starting from block[1] with the size indicating by block[0].
>
> Signed-off-by: Fan Du <fan.du@xxxxxxxxx>
> ---
> drivers/i2c/busses/i2c-ismt.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
> index 8a0275c..3f6ecbf 100644
> --- a/drivers/i2c/busses/i2c-ismt.c
> +++ b/drivers/i2c/busses/i2c-ismt.c
> @@ -497,7 +497,7 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
> desc->wr_len_cmd = dma_size;
> desc->control |= ISMT_DESC_BLK;
> priv->dma_buffer[0] = command;
> - memcpy(&priv->dma_buffer[1], &data->block[1], dma_size);
> + memcpy(&priv->dma_buffer[1], &data->block[1], dma_size - 1);
> } else {
> /* Block Read */
> dev_dbg(dev, "I2C_SMBUS_BLOCK_DATA: READ\n");
> @@ -525,7 +525,7 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
> desc->wr_len_cmd = dma_size;
> desc->control |= ISMT_DESC_I2C;
> priv->dma_buffer[0] = command;
> - memcpy(&priv->dma_buffer[1], &data->block[1], dma_size);
> + memcpy(&priv->dma_buffer[1], &data->block[1], dma_size - 1);
> } else {
> /* i2c Block Read */
> dev_dbg(dev, "I2C_SMBUS_I2C_BLOCK_DATA: READ\n");
> --
> 1.7.9.5
>
>
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
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