Hi Thierry, On 2016年06月04日 00:54, Thierry Reding wrote:
On Fri, Jun 03, 2016 at 05:55:17PM +0800, Lin Huang wrote: [...]+ ret = clk_prepare_enable(data->clk); + if (ret) { + dev_err(&pdev->dev, "failed to enable clk: %d\n", ret); + clk_disable_unprepare(data->clk); + return ret; + }This is going to give you a large WARN. clk_prepare_enable() already leaves the clock in a proper state when it fails (i.e. it calls clk_unprepare() if the clk_enable() part failed), so calling clk_disable_unprepare() upon failure is going to unbalance the reference counts.
Thanks for reminding, i will fix it next version.
Thierry
-- Lin Huang
