Re: [PATCH V2] rtc: add devm_rtc_device_{register,unregister}()

From: 'Tejun Heo'
Date: Mon Feb 25 2013 - 20:23:27 EST


On Tue, Feb 26, 2013 at 10:21:06AM +0900, Jingoo Han wrote:
> These functios allows the driver core to automatically clean up
> any allocation made by rtc drivers. Thus, it simplifies the error
> paths.
> Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx>

Looks okay to me but

> +static int devm_rtc_device_match(struct device *dev, void *res, void *data)
> +{
> + struct rtc **r = res;
> + if (WARN_ON(!r || !*r))
> + return 0;
> +
> + return *r == data;
> +}

again, why do we need the WARN_ON() at all given that other
devm_*_match() don't do that and the only way to get NULL there would
be bug in devm_rtc*() code itself rather than its users?


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