* [PATCH] ACPI/PPTT: Simplify leaf node detection.
@ 2019-03-01 18:52 Jeremy Linton
2019-03-04 10:02 ` Sudeep Holla
0 siblings, 1 reply; 3+ messages in thread
From: Jeremy Linton @ 2019-03-01 18:52 UTC (permalink / raw)
To: linux-acpi
Cc: rjw, lenb, sudeep.holla, Lorenzo.Pieralisi, linux-arm-kernel,
linux-kernel, Jeremy Linton
ACPI 6.3 bumps the PPTT table revision and adds a LEAF_NODE flag.
This allows us to avoid a second pass through the table to assure
that the node in question is a leaf.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
drivers/acpi/pptt.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index ad31c50de3be..065c4fc245d1 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c
@@ -209,6 +209,9 @@ static int acpi_pptt_leaf_node(struct acpi_table_header *table_hdr,
struct acpi_pptt_processor *cpu_node;
u32 proc_sz;
+ if (table_hdr->revision > 1)
+ return (node->flags & ACPI_PPTT_ACPI_LEAF_NODE);
+
table_end = (unsigned long)table_hdr + table_hdr->length;
node_entry = ACPI_PTR_DIFF(node, table_hdr);
entry = ACPI_ADD_PTR(struct acpi_subtable_header, table_hdr,
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] ACPI/PPTT: Simplify leaf node detection.
2019-03-01 18:52 [PATCH] ACPI/PPTT: Simplify leaf node detection Jeremy Linton
@ 2019-03-04 10:02 ` Sudeep Holla
2019-03-12 9:31 ` Rafael J. Wysocki
0 siblings, 1 reply; 3+ messages in thread
From: Sudeep Holla @ 2019-03-04 10:02 UTC (permalink / raw)
To: Jeremy Linton
Cc: linux-acpi, rjw, lenb, Lorenzo.Pieralisi, linux-arm-kernel,
linux-kernel, Sudeep Holla
On Fri, Mar 01, 2019 at 12:52:21PM -0600, Jeremy Linton wrote:
> ACPI 6.3 bumps the PPTT table revision and adds a LEAF_NODE flag.
> This allows us to avoid a second pass through the table to assure
> that the node in question is a leaf.
>
Reviewed-by:Sudeep Holla <sudeep.holla@arm.com>
--
Regards,
Sudeep
> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
> ---
> drivers/acpi/pptt.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
> index ad31c50de3be..065c4fc245d1 100644
> --- a/drivers/acpi/pptt.c
> +++ b/drivers/acpi/pptt.c
> @@ -209,6 +209,9 @@ static int acpi_pptt_leaf_node(struct acpi_table_header *table_hdr,
> struct acpi_pptt_processor *cpu_node;
> u32 proc_sz;
>
> + if (table_hdr->revision > 1)
> + return (node->flags & ACPI_PPTT_ACPI_LEAF_NODE);
> +
> table_end = (unsigned long)table_hdr + table_hdr->length;
> node_entry = ACPI_PTR_DIFF(node, table_hdr);
> entry = ACPI_ADD_PTR(struct acpi_subtable_header, table_hdr,
> --
> 2.20.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] ACPI/PPTT: Simplify leaf node detection.
2019-03-04 10:02 ` Sudeep Holla
@ 2019-03-12 9:31 ` Rafael J. Wysocki
0 siblings, 0 replies; 3+ messages in thread
From: Rafael J. Wysocki @ 2019-03-12 9:31 UTC (permalink / raw)
To: Sudeep Holla, Jeremy Linton
Cc: linux-acpi, lenb, Lorenzo.Pieralisi, linux-arm-kernel, linux-kernel
On Monday, March 4, 2019 11:02:08 AM CET Sudeep Holla wrote:
> On Fri, Mar 01, 2019 at 12:52:21PM -0600, Jeremy Linton wrote:
> > ACPI 6.3 bumps the PPTT table revision and adds a LEAF_NODE flag.
> > This allows us to avoid a second pass through the table to assure
> > that the node in question is a leaf.
> >
>
> Reviewed-by:Sudeep Holla <sudeep.holla@arm.com>
>
> --
> Regards,
> Sudeep
>
> > Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
> > ---
> > drivers/acpi/pptt.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
> > index ad31c50de3be..065c4fc245d1 100644
> > --- a/drivers/acpi/pptt.c
> > +++ b/drivers/acpi/pptt.c
> > @@ -209,6 +209,9 @@ static int acpi_pptt_leaf_node(struct acpi_table_header *table_hdr,
> > struct acpi_pptt_processor *cpu_node;
> > u32 proc_sz;
> >
> > + if (table_hdr->revision > 1)
> > + return (node->flags & ACPI_PPTT_ACPI_LEAF_NODE);
> > +
> > table_end = (unsigned long)table_hdr + table_hdr->length;
> > node_entry = ACPI_PTR_DIFF(node, table_hdr);
> > entry = ACPI_ADD_PTR(struct acpi_subtable_header, table_hdr,
> > --
Patch applied, thanks!
^ permalink raw reply [flat|nested] 3+ messages in thread
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2019-03-01 18:52 [PATCH] ACPI/PPTT: Simplify leaf node detection Jeremy Linton
2019-03-04 10:02 ` Sudeep Holla
2019-03-12 9:31 ` Rafael J. Wysocki
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