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contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,hong-chih.hsueh@amd.com List-Unsubscribe-Post: List-Unsubscribe=One-Click List-Unsubscribe: X-Gm-Message-State: l0v6qMgLyX6gUYPUasamIEKhx7686176AA= Content-Language: en-US Content-Type: multipart/mixed; boundary="_004_BL1PR12MB5288A996210EE83BB0E670C2B9502BL1PR12MB5288namp_" X-GND-Status: LEGIT Authentication-Results: spool.mail.gandi.net; dkim=pass header.d=groups.io header.s=20140610 header.b="ej16/6mV"; dmarc=pass (policy=none) header.from=groups.io; spf=pass (spool.mail.gandi.net: domain of bounce@groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce@groups.io --_004_BL1PR12MB5288A996210EE83BB0E670C2B9502BL1PR12MB5288namp_ Content-Type: multipart/alternative; boundary="_000_BL1PR12MB5288A996210EE83BB0E670C2B9502BL1PR12MB5288namp_" --_000_BL1PR12MB5288A996210EE83BB0E670C2B9502BL1PR12MB5288namp_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [AMD Official Use Only - General] Hi Feng & Laszlo, Thank you for the feedback, I have changed the title of this email and the = title of the commit message of this patch. The new patch as attached. If this patch looks good to you, could you pleas= e help to add reviewed-by? Thanks! Regards, Neo ________________________________ From: Ding, Feng (Sunnyvale) Sent: Thursday, February 8, 2024 5:09 PM To: Laszlo Ersek ; devel@edk2.groups.io ; Hsueh, Hong-Chih (Neo) Cc: He, Jiangang ; Chang, Abner ;= ray.ni@intel.com ; gaoliming@byosoft.com.cn ; Gopal, Pradeep Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/PciBusDxe: Fix hotplug funct= ionality for USB4 bridge [AMD Official Use Only - General] Hi Laszlo, " MdeModulePkg/PciBusDxe: plug device hierarchy leak upon bridge hot-unplug= " is perfect description for the issue. "a root bridge" is "a (PCIe Hotplug) bridge", locating anywhere. Thanks feng -----Original Message----- From: Laszlo Ersek Sent: Wednesday, February 7, 2024 12:51 PM To: devel@edk2.groups.io; Hsueh, Hong-Chih (Neo) Cc: Ding, Feng (Sunnyvale) ; He, Jiangang ; Chang, Abner ; ray.ni@intel.com; gaoliming@b= yosoft.com.cn Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/PciBusDxe: Fix hotplug funct= ionality for USB4 bridge Caution: This message originated from an External Source. Use proper cautio= n when opening attachments, clicking links, or responding. On 2/6/24 23:34, Hsueh, Hong-Chih (Neo) via groups.io wrote: > A USB4 or TBT bridge can be plugged or unplugged on USB4 port. The action= s require PciHotPlugRequestNotify to add a root bridge or remove a root bri= dge completely. > In the plug-unplug-plug scenerio, PciHotPlugRequestNotify will return wit= h no-action on second plug because bridge tree shows configured. > Destroy Pci Device Tree in function PciHotPlugRequestNotify for unplug ev= ent to fix this issue. > > Cc: Feng Ding > Cc: Jiangang He > Signed-off-by: Neo Hsueh > --- > MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c b/MdeModulePk= g/Bus/Pci/PciBusDxe/PciEnumerator.c > index 3f8c6e6da7..2b7af60e0a 100644 > --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c > +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c > @@ -2103,6 +2103,8 @@ PciHotPlugRequestNotify ( > } > } > > + DestroyPciDeviceTree (Bridge); > + > // > // End for > // I think the subject line is too specific. This patch appears to fix a gener= al resource leak in the PCI hot-unplug functionality. Writing up the USB4 a= ngle in the commit message is welcome in my opinion, but the subject should= state something like: MdeModulePkg/PciBusDxe: plug device hierarchy leak upon bridge hot-unplug (And I think the bridge doesn't even have to be a *root* bridge for the lea= k to occur; is that right?) Laszlo -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#115677): https://edk2.groups.io/g/devel/message/115677 Mute This Topic: https://groups.io/mt/104474693/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- --_000_BL1PR12MB5288A996210EE83BB0E670C2B9502BL1PR12MB5288namp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

[AMD Official Use Only - General]


Hi Feng & Laszlo,

Thank you for the feedback, I have changed the title of this email and the = title of the commit message of this patch.
The new patch as attached. If this patch looks good to you, could you pleas= e help to add reviewed-by?

Thanks!

Regards,
Neo

From: Ding, = Feng (Sunnyvale) <feng1.ding@amd.com>
Sent: Thursday, February 8, 2024 5:09 PM
To: Laszlo Ersek <lersek@redhat.com>; devel@edk2.groups.i= o <devel@edk2.groups.io>; Hsueh, Hong-Chih (Neo) <Hong-Chih.Hsueh@= amd.com>
Cc: He, Jiangang <Jiangang.He@amd.com>; Chang, Abner <= Abner.Chang@amd.com>; ray.ni@intel.com <ray.ni@intel.com>; gaolimi= ng@byosoft.com.cn <gaoliming@byosoft.com.cn>; Gopal, Pradeep <Prad= eep.Gopal@amd.com>
Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/PciBusDxe: Fix h= otplug functionality for USB4 bridge
 
[AMD Official Use Only - General]

Hi Laszlo,

" MdeModulePkg/PciBusDxe: plug device hierarchy leak upon bridge hot-u= nplug " is perfect description for the issue.
"a root bridge" is "a (PCIe Hotplug) bridge", locating = anywhere.

Thanks
feng

-----Original Message-----
From: Laszlo Ersek <lersek@redhat.com>
Sent: Wednesday, February 7, 2024 12:51 PM
To: devel@edk2.groups.io; Hsueh, Hong-Chih (Neo) <Hong-Chih.Hsueh@amd.co= m>
Cc: Ding, Feng (Sunnyvale) <feng1.ding@amd.com>; He, Jiangang <Jia= ngang.He@amd.com>; Chang, Abner <Abner.Chang@amd.com>; ray.ni@inte= l.com; gaoliming@byosoft.com.cn
Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/PciBusDxe: Fix hotplug funct= ionality for USB4 bridge

Caution: This message originated from an External Source. Use proper cautio= n when opening attachments, clicking links, or responding.


On 2/6/24 23:34, Hsueh, Hong-Chih (Neo) via groups.io wrote:
> A USB4 or TBT bridge can be plugged or unplugged on USB4 port. The act= ions require PciHotPlugRequestNotify to add a root bridge or remove a root = bridge completely.
> In the plug-unplug-plug scenerio, PciHotPlugRequestNotify will return = with no-action on second plug because bridge tree shows configured.
> Destroy Pci Device Tree in function PciHotPlugRequestNotify for unplug= event to fix this issue.
>
> Cc: Feng Ding <feng1.ding@amd.com>
> Cc: Jiangang He <jiangang.he@amd.com>
> Signed-off-by: Neo Hsueh <Hong-Chih.Hsueh@amd.com>
> ---
>  MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c b/MdeModul= ePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
> index 3f8c6e6da7..2b7af60e0a 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
> @@ -2103,6 +2103,8 @@ PciHotPlugRequestNotify (
>        }
>      }
>
> +    DestroyPciDeviceTree (Bridge);
> +
>      //
>      // End for
>      //

I think the subject line is too specific. This patch appears to fix a gener= al resource leak in the PCI hot-unplug functionality. Writing up the USB4 a= ngle in the commit message is welcome in my opinion, but the subject should= state something like:

MdeModulePkg/PciBusDxe: plug device hierarchy leak upon bridge hot-unplug
(And I think the bridge doesn't even have to be a *root* bridge for the lea= k to occur; is that right?)

Laszlo

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