On Mon, 10. Mar 10:53, Frank Li wrote:
> On Sun, Mar 09, 2025 at 08:57:58PM +0300, Fedor Pchelkin wrote:
> > Upon encountering errors during the HSIC pinctrl handling section the
> > regulator should be disabled.
> >
> > After the above-stated changes it is possible to jump onto
> > "disable_hsic_regulator" label without having added the CPU latency QoS
> > request previously. This would result in cpu_latency_qos_remove_request()
> > yielding a WARNING.
> >
> > So rearrange the error handling path to follow the reverse order of
> > different probing phases.
>
> Suggest use devm_add_action() to simple whole error handle code.
I'll try with that in v2 then, thanks for suggestion.
>
> >
> > Found by Linux Verification Center (linuxtesting.org).
>
> I think this sentense have not provide valuable informaiton for reader.
Well, that's a line which the organization rules specify to put into
every bugfix patch found on its behalf. I must follow these rules.
Btw, you can find this in the changelogs of many other commits existing
in the main kernel tree:
$ git shortlog --grep="linuxtesting.org" --group=format:""
(859):
kernel/range.c: fix clean_sort_range() for the case of full array
Staging: pohmelfs/dir.c: Remove unneeded mutex_unlock() from pohmelfs_rename()
USB: usb-gadget: unlock data->lock mutex on error path in ep_read()
...
>
> Frank
>
> >
> > Fixes: 4d6141288c33 ("usb: chipidea: imx: pinctrl for HSIC is optional")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Fedor Pchelkin <pchelkin@xxxxxxxxx>
> > ---
> > drivers/usb/chipidea/ci_hdrc_imx.c | 15 ++++++++-------
> > 1 file changed, 8 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
> > index 619779eef333..3f11ae071c7f 100644
> > --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> > +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> > @@ -407,13 +407,13 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
> > "pinctrl_hsic_idle lookup failed, err=%ld\n",
> > PTR_ERR(pinctrl_hsic_idle));
> > ret = PTR_ERR(pinctrl_hsic_idle);
> > - goto err_put;
> > + goto disable_hsic_regulator;
> > }
> >
> > ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
> > if (ret) {
> > dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
> > - goto err_put;
> > + goto disable_hsic_regulator;
> > }
> >
> > data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
> > @@ -423,7 +423,7 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
> > "pinctrl_hsic_active lookup failed, err=%ld\n",
> > PTR_ERR(data->pinctrl_hsic_active));
> > ret = PTR_ERR(data->pinctrl_hsic_active);
> > - goto err_put;
> > + goto disable_hsic_regulator;
> > }
> > }
> >
> > @@ -432,11 +432,11 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
> >
> > ret = imx_get_clks(dev);
> > if (ret)
> > - goto disable_hsic_regulator;
> > + goto qos_remove_request;
> >
> > ret = imx_prepare_enable_clks(dev);
> > if (ret)
> > - goto disable_hsic_regulator;
> > + goto qos_remove_request;
> >
> > ret = clk_prepare_enable(data->clk_wakeup);
> > if (ret)
> > @@ -526,12 +526,13 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
> > clk_disable_unprepare(data->clk_wakeup);
> > err_wakeup_clk:
> > imx_disable_unprepare_clks(dev);
> > +qos_remove_request:
> > + if (pdata.flags & CI_HDRC_PMQOS)
> > + cpu_latency_qos_remove_request(&data->pm_qos_req);
> > disable_hsic_regulator:
> > if (data->hsic_pad_regulator)
> > /* don't overwrite original ret (cf. EPROBE_DEFER) */
> > regulator_disable(data->hsic_pad_regulator);
> > - if (pdata.flags & CI_HDRC_PMQOS)
> > - cpu_latency_qos_remove_request(&data->pm_qos_req);
> > data->ci_pdev = NULL;
> > err_put:
> > if (data->usbmisc_data)
> > --
> > 2.48.1
> >
