Re: [PATCH 2/2] usb: bdc: Fix a resource leak in the error handling path of 'bdc_probe()'

[Florian Fainelli]

On 8/18/2021 9:32 PM, Christophe JAILLET wrote:
> If an error occurs after a successful 'clk_prepare_enable()' call, it must
> be undone by a corresponding 'clk_disable_unprepare()' call.
> This call is already present in the remove function.
>
> Add this call in the error handling path and reorder the code so that the
> 'clk_prepare_enable()' call happens later in the function.
> The goal is to have as much managed resources functions as possible
> before the 'clk_prepare_enable()' call in order to keep the error handling
> path simple.
>
> While at it, remove the now unneeded 'clk' variable.
>
> Fixes: c87dca047849 ("usb: bdc: Add clock enable for new chips with a separate BDC clock")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

Acked-by: Florian Fainelli <f.fainelli@xxxxxxxxx>

> ---
> Review with care.
> I don't like shuffling code like that because of possible side effect.
> Moving the code related to this clk looks fine to me, but who knows...

There are no register accesses until bdc_phy_init() gets called, so this 
looks fine to me. Al knows this code better than I do though, so it 
would be better to wait for his Acked-by tag.
--
Florian