Re: [PATCH 1/2] arm/virt/acpi: remove meaningless sub device "PR0" from PCI0

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Jan 13, 2020 at 01:37:02PM +0100, Igor Mammedov wrote:
> On Thu, 19 Dec 2019 14:47:58 +0800
> Heyi Guo <guoheyi@huawei.com> wrote:
> 
> > The sub device "PR0" under PCI0 in ACPI/DSDT does not make any sense,
> > so simply remote it.
> Could you make commit message more concrete so it would say
> why it doesn't make any sense.
> 
> It seems to be there to describe root port,
> I'd rather have PCI folk ack if it's ok to remove it.

An empty device like this doesn't really do anything useful I think.
commit log needs to be fixed up though.


> > 
> > Signed-off-by: Heyi Guo <guoheyi@huawei.com>
> > 
> > ---
> > Cc: Peter Maydell <peter.maydell@linaro.org>
> > Cc: "Michael S. Tsirkin" <mst@redhat.com>
> > Cc: Igor Mammedov <imammedo@redhat.com>
> > Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
> > Cc: qemu-arm@nongnu.org
> > Cc: qemu-devel@nongnu.org
> > ---
> >  hw/arm/virt-acpi-build.c          |   4 ----
> >  tests/data/acpi/virt/DSDT         | Bin 18462 -> 18449 bytes
> >  tests/data/acpi/virt/DSDT.memhp   | Bin 19799 -> 19786 bytes
> >  tests/data/acpi/virt/DSDT.numamem | Bin 18462 -> 18449 bytes
> >  4 files changed, 4 deletions(-)
> > 
> > diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> > index bd5f771e9b..9f4c7d1889 100644
> > --- a/hw/arm/virt-acpi-build.c
> > +++ b/hw/arm/virt-acpi-build.c
> > @@ -317,10 +317,6 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
> >      aml_append(method, aml_return(buf));
> >      aml_append(dev, method);
> >  
> > -    Aml *dev_rp0 = aml_device("%s", "RP0");
> > -    aml_append(dev_rp0, aml_name_decl("_ADR", aml_int(0)));
> > -    aml_append(dev, dev_rp0);
> > -
> >      Aml *dev_res0 = aml_device("%s", "RES0");
> >      aml_append(dev_res0, aml_name_decl("_HID", aml_string("PNP0C02")));
> >      crs = aml_resource_template();
> > diff --git a/tests/data/acpi/virt/DSDT b/tests/data/acpi/virt/DSDT
> > index d0f3afeb134fdf1c11f64cd06dbcdd30be603b80..b5895cb22446860a0b9be3d32ec856feb388be4c 100644
> > GIT binary patch
> > delta 39
> > vcmbO?fpOvlMlP3Nmk>b@1_q`B6S<_Bdg?Z+cXBfI+}XT|v(|R9jr$`2@RSW)  
> > 
> > delta 50
> > zcmbO@fpOjhMlP3Nmk>D*1_q{tiCof5o%I{lJ2{y;?{412S!>J19TZ>?&k^tF5;R%I  
> > G{V4!>hYx%J  
> > 
> > diff --git a/tests/data/acpi/virt/DSDT.memhp b/tests/data/acpi/virt/DSDT.memhp
> > index 41ccc6431b917252bcbaac86c33b340c796be5ce..69ad844f65d047973a3e55198beecd45a35b8fce 100644
> > GIT binary patch
> > delta 40
> > wcmcaUi}BPfMlP3Nmk=*s1_q}3iCof5t(P{ccXBfI+}XT|v(|RAjk`1(02g)*ivR!s
> > 
> > delta 51
> > zcmX>#i}Cs_MlP3NmymE@1_mbiiCof5O_w*ScXBdy-rc;3v(}c2J1D>)o+IATC1|sb  
> > HyBr$;t7;Fc
> > 
> > diff --git a/tests/data/acpi/virt/DSDT.numamem b/tests/data/acpi/virt/DSDT.numamem
> > index d0f3afeb134fdf1c11f64cd06dbcdd30be603b80..b5895cb22446860a0b9be3d32ec856feb388be4c 100644
> > GIT binary patch
> > delta 39
> > vcmbO?fpOvlMlP3Nmk>b@1_q`B6S<_Bdg?Z+cXBfI+}XT|v(|R9jr$`2@RSW)  
> > 
> > delta 50
> > zcmbO@fpOjhMlP3Nmk>D*1_q{tiCof5o%I{lJ2{y;?{412S!>J19TZ>?&k^tF5;R%I  
> > G{V4!>hYx%J  
> >