Re: [edk2-devel] [PATCH] MdeModulePkg/PeiMain: Substantial change for PeiAllocatePool

["Wu, Hao A" <hao.a.wu@intel.com>]

> -----Original Message-----
> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of
> Laszlo Ersek
> Sent: Wednesday, June 12, 2019 4:34 PM
> To: devel@edk2.groups.io; Gao, Zhichao
> Cc: Bret Barkelew; Wang, Jian J; Wu, Hao A; Ni, Ray; Zeng, Star; Gao, Liming;
> Sean Brogan; Michael Turner
> Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/PeiMain: Substantial
> change for PeiAllocatePool
> 
> Hi Zhichao,
> 
> On 06/12/19 06:50, Gao, Zhichao wrote:
> > From: Bret Barkelew <Bret.Barkelew@microsoft.com>
> >
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1901
> >
> > The original logic is ASSERT if fail to create HOB. But
> > that doesn't make sense for release version. So it is required
> > to set the Buffer to null to indicate the failure.
> 
> this patch may or may not be worthwhile; that's for the PEI Core
> maintainers to evaluate.


Looks to me like a valid enhancement for error handling.

Liming,
Do you have any comment on this one?

Best Regards,
Hao Wu


> 
> Either way, the subject line is completely useless. "Substantial change"
> means nothing at all. Please write a subject line that reflects what
> this patch *actually does*.
> 
> For example:
> 
> MdeModulePkg/PeiMain: PeiAllocatePool: output NULL if HOB creation fails
> 
> (72 characters).
> 
> Thanks
> Laszlo
> 
> > Cc: Jian J Wang <jian.j.wang@intel.com>
> > Cc: Hao Wu <hao.a.wu@intel.com>
> > Cc: Ray Ni <ray.ni@intel.com>
> > Cc: Star Zeng <star.zeng@intel.com>
> > Cc: Liming Gao <liming.gao@intel.com>
> > Cc: Sean Brogan <sean.brogan@microsoft.com>
> > Cc: Michael Turner <Michael.Turner@microsoft.com>
> > Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
> > Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
> > ---
> >  MdeModulePkg/Core/Pei/Memory/MemoryServices.c | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
> b/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
> > index 42f79ab076..37b0cfa3cf 100644
> > --- a/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
> > +++ b/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
> > @@ -802,7 +802,12 @@ PeiAllocatePool (
> >               (VOID **)&Hob
> >               );
> >    ASSERT_EFI_ERROR (Status);
> > -  *Buffer = Hob+1;
> > +
> > +  if (EFI_ERROR (Status)) {
> > +    *Buffer = NULL;
> > +  } else {
> > +    *Buffer = Hob+1;
> > +  }
> >
> >    return Status;
> >  }
> >
> 
> 
>