[Intel-gfx] [PATCH v4 17/26] drm/i915/slpc: Add enable/disable debugfs for slpc

[Chris Wilson]

On Fri, Sep 09, 2016 at 06:21:36PM +0530, Sagar Arun Kamble wrote:
> +static ssize_t slpc_dcc_write(struct file *file, const char __user *ubuf,
> +			      size_t len, loff_t *offp)
> +{
> +	struct seq_file *m = file->private_data;
> +	int ret = 0;
> +
> +	ret = slpc_param_write(m, ubuf, len, SLPC_PARAM_TASK_ENABLE_DCC,
> +			       SLPC_PARAM_TASK_DISABLE_DCC);
> +	if (ret)
> +		return (size_t) ret;

What value is (ssize_t)(size_t)-1 as seen by userspace? Is it negative?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre