linux-kernel - [PATCH] ACPI: Increase ACPI_MAX

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Message-Id: <20210518162034.1.I7db737fa0a8e7da8247a1a614633bc0fc6455a00@changeid>
Date:   Tue, 18 May 2021 16:20:39 -0600
From:   Raul E Rangel <rrangel@...omium.org>
To:     linux-acpi@...r.kernel.org
Cc:     Raul E Rangel <rrangel@...omium.org>,
        Erik Kaneda <erik.kaneda@...el.com>,
        Len Brown <lenb@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Robert Moore <robert.moore@...el.com>, devel@...ica.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ACPI: Increase ACPI_MAX_HANDLES

acpi_handle_list is used to store the references returned by
ThermalZone._PSL. With processors supporting Hyper-threading and more
cores, the previous limit is not enough for common cases. If _PSL
returns more than the limit, the passive thermal threshold fails to
initialize.

This change increase the limit to 32, so we can support at least 16 core
CPUs with Hyper-threads.

I acknowledge that this change is just kicking the can down the road.

Signed-off-by: Raul E Rangel <rrangel@...omium.org>
---

 include/acpi/acpi_bus.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 37dac195adbb..fdce8e7c4718 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -13,7 +13,7 @@
 #include <linux/property.h>
 
 /* TBD: Make dynamic */
-#define ACPI_MAX_HANDLES	10
+#define ACPI_MAX_HANDLES	32
 struct acpi_handle_list {
 	u32 count;
 	acpi_handle handles[ACPI_MAX_HANDLES];
-- 
2.31.1.751.gd2f1c929bd-goog