Messages in this thread | | | Date | Wed, 7 Jun 2023 16:21:55 +0200 | From | Lorenzo Pieralisi <> | Subject | Re: [PATCH v2 2/4] ACPI/APMT: Don't register invalid resource |
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On Mon, Jun 05, 2023 at 06:01:32PM +0100, Robin Murphy wrote: > Don't register a resource for the second page unless the dual-page > extension flag is actually present to say it's valid. > > CC: Lorenzo Pieralisi <lpieralisi@kernel.org> > CC: Sudeep Holla <sudeep.holla@arm.com> > Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> > Reviewed-by: Hanjun Guo <guohanjun@huawei.com> > Reviewed-and-tested-by: Ilkka Koskinen <ilkka@os.amperecomputing.com> > Signed-off-by: Robin Murphy <robin.murphy@arm.com> > --- > drivers/acpi/arm64/apmt.c | 10 ++++++---- > 1 file changed, 6 insertions(+), 4 deletions(-)
Acked-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
As you mentioned in v1 I don't think we need to backport this since the kernel is working around it (in code you are cleaning up) even though that would not hurt.
Lorenzo
> diff --git a/drivers/acpi/arm64/apmt.c b/drivers/acpi/arm64/apmt.c > index 8cab69fa5d59..aa7d5c3c0dd8 100644 > --- a/drivers/acpi/arm64/apmt.c > +++ b/drivers/acpi/arm64/apmt.c > @@ -35,11 +35,13 @@ static int __init apmt_init_resources(struct resource *res, > > num_res++; > > - res[num_res].start = node->base_address1; > - res[num_res].end = node->base_address1 + SZ_4K - 1; > - res[num_res].flags = IORESOURCE_MEM; > + if (node->flags & ACPI_APMT_FLAGS_DUAL_PAGE) { > + res[num_res].start = node->base_address1; > + res[num_res].end = node->base_address1 + SZ_4K - 1; > + res[num_res].flags = IORESOURCE_MEM; > > - num_res++; > + num_res++; > + } > > if (node->ovflw_irq != 0) { > trigger = (node->ovflw_irq_flags & ACPI_APMT_OVFLW_IRQ_FLAGS_MODE); > -- > 2.39.2.101.g768bb238c484.dirty >
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