From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"marex@denx.de" <marex@denx.de>,
"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: Re: [RFC for-5.8] usb: dwc2: Cleanup debugfs when usb_add_gadget_udc() fails
Date: Wed, 1 Jul 2020 07:16:14 +0000 [thread overview]
Message-ID: <0ba4b7ce-3551-0453-bac7-4d86c53dd2e8@synopsys.com> (raw)
In-Reply-To: <20200629180314.2878638-1-martin.blumenstingl@googlemail.com>
Hi Martin,
On 6/29/2020 10:03 PM, Martin Blumenstingl wrote:
> Call dwc2_debugfs_exit() when usb_add_gadget_udc() has failed. This
> ensure that the debugfs entries created by dwc2_debugfs_init() are
> cleaned up in the error path.
>
> Fixes: 207324a321a866 ("usb: dwc2: Postponed gadget registration to the udc class driver")
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
> This patch is compile-tested only. I found this while trying to
> understand the latest changes to dwc2/platform.c.
>
>
> drivers/usb/dwc2/platform.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
> index c347d93eae64..02b6da7e21d7 100644
> --- a/drivers/usb/dwc2/platform.c
> +++ b/drivers/usb/dwc2/platform.c
> @@ -582,12 +582,14 @@ static int dwc2_driver_probe(struct platform_device *dev)
> retval = usb_add_gadget_udc(hsotg->dev, &hsotg->gadget);
> if (retval) {
> dwc2_hsotg_remove(hsotg);
> - goto error_init;
> + goto error_debugfs;
> }
> }
> #endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */
> return 0;
>
> +error_debugfs:
> + dwc2_debugfs_exit(hsotg);
> error_init:
> if (hsotg->params.activate_stm_id_vb_detection)
> regulator_disable(hsotg->usb33d);
>
I'm Ok with this fix. One more thing. I missed to remove hcd also in
fail case. Could you please add dwc2_hcd_remove() call after
dwc2_debugfs_exit(hsotg) and submit as patch:
+error_debugfs:
+ dwc2_debugfs_exit(hsotg);
+ if (hsotg->hcd_enabled)
+ dwc2_hcd_remove(hsotg);
error_init:
Thanks,
Minas
next prev parent reply other threads:[~2020-07-01 7:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 18:03 [RFC for-5.8] usb: dwc2: Cleanup debugfs when usb_add_gadget_udc() fails Martin Blumenstingl
2020-07-01 7:16 ` Minas Harutyunyan [this message]
2020-07-23 13:03 ` Felipe Balbi
2020-07-23 13:22 ` Minas Harutyunyan
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