Reviewed-by: Zhichao Gao <zhichao....@intel.com>
Thanks,
Zhichao
> -----Original Message-----
> From: Ard Biesheuvel <a...@kernel.org>
> Sent: Saturday, December 10, 2022 1:44 AM
> To: Kinney, Michael D <michael.d.kin...@intel.com>
> Cc: devel@edk2.groups.io; Ni, Ray <ray...@intel.com>; Gao, Zhichao
> <zhichao....@intel.com>
> Subject: Re: [Patch 1/1] ShellPkg/Shell: Do not set end device path if already
> end
>
> On Fri, 9 Dec 2022 at 17:00, Michael D Kinney <michael.d.kin...@intel.com>
> wrote:
> >
> > Update Shell Protocol EfiShellGetMapFromDevicePath() to not set the
> > end if the device path if it is already an end of entire device path.
> > This removes a write oprtation that can cause failures if the Device
> > Path Protocol is mapped to read-only memory. In general Device Path
> > Protocols should not be modified unless the API explicitly states that
> > the device path is modified.
> >
> > Cc: Ard Biesheuvel <a...@kernel.org>
> > Cc: Ray Ni <ray...@intel.com>
> > Cc: Zhichao Gao <zhichao....@intel.com>
> > Signed-off-by: Michael D Kinney <michael.d.kin...@intel.com>
>
> Reviewed-by: Ard Biesheuvel <a...@kernel.org>
>
> > ---
> > ShellPkg/Application/Shell/ShellProtocol.c | 8 +++++++-
> > 1 file changed, 7 insertions(+), 1 deletion(-)
> >
> > diff --git a/ShellPkg/Application/Shell/ShellProtocol.c
> > b/ShellPkg/Application/Shell/ShellProtocol.c
> > index 509eb60e40f4..e6d20ab16479 100644
> > --- a/ShellPkg/Application/Shell/ShellProtocol.c
> > +++ b/ShellPkg/Application/Shell/ShellProtocol.c
> > @@ -294,7 +294,13 @@ EfiShellGetMapFromDevicePath (
> > *DevicePath = NextDevicePathNode (*DevicePath);
> > }
> >
> > - SetDevicePathEndNode (*DevicePath);
> > + //
> > + // Do not call SetDevicePathEndNode() if the device path node is
> already the
> > + // end of an entire device path.
> > + //
> > + if (!IsDevicePathEnd (*DevicePath)) {
> > + SetDevicePathEndNode (*DevicePath);
> > + }
> > }
> >
> > /*
> > --
> > 2.37.1.windows.1
> >
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