On Fri, Oct 3, 2014 at 1:52 PM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
> +static void
> +simplefb_clocks_init(struct platform_device *pdev, struct list_head *list)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + int clock_count, i;
> +
> + INIT_LIST_HEAD(list);
> +
> + if (dev_get_platdata(&pdev->dev) || !np)
> + return;
> +
> + clock_count = of_clk_get_parent_count(np);
> + for (i = 0; i < clock_count; i++) {
> + struct simplefb_clock *entry;
> + struct clk *clock = of_clk_get(np, i);
> + int ret;
> +
> + if (IS_ERR(clock)) {
> + dev_err(&pdev->dev, "%s: clock %d not found: %ld\n",
> + __func__, i, PTR_ERR(clock));
> + continue;
> + }
> +
> + ret = clk_prepare_enable(clock);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "%s: failed to enable clock %d: %d\n",
> + __func__, i, ret);
> + clk_put(clock);
> + continue;
> + }
> +
> + entry = kzalloc(sizeof(struct simplefb_clock), GFP_KERNEL);
> + if (!entry) {
> + clk_disable_unprepare(clock);
> + clk_put(clock);
> + continue;
> + }
I'd allocate memory first, to avoid calling clk_disable_unprepare() (which
will kill your display) if memory allocation fails.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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