> @@ -293,7 +360,7 @@ static const struct i2c_algorithm bcm_iproc_algo = {
>  static struct i2c_adapter_quirks bcm_iproc_i2c_quirks = {
>  	/* need to reserve one byte in the FIFO for the slave address */
>  	.max_read_len = M_TX_RX_FIFO_SIZE - 1,
> -	.max_write_len = M_TX_RX_FIFO_SIZE - 1,
> +	.max_write_len = 65535,

You can simply remove this line because len is u16 in the i2c core anyhow.