linux-kernel - [PATCH v1] ACPI: Property: Fix type detection of unified integer reading functions

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Date:   Fri, 12 Aug 2022 14:06:45 +0100
From:   Stefan Binding <sbinding@...nsource.cirrus.com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>
CC:     <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v1] ACPI: Property: Fix type detection of unified integer reading functions

The current code expects the type of the value to be an integer type,
instead the value passed to the macro is a pointer.
Ensure the size comparison uses the correct pointer type to choose the
max value, instead of using the integer type.

Fixes: 923044133367 ("ACPI: property: Unify integer value reading functions")

Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
---
 drivers/acpi/property.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 7b3ad8ed2f4e..b1d4a8db89df 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1043,10 +1043,10 @@ static int acpi_data_prop_read_single(const struct acpi_device_data *data,
 				break;					\
 			}						\
 			if (__items[i].integer.value > _Generic(__val,	\
-								u8: U8_MAX, \
-								u16: U16_MAX, \
-								u32: U32_MAX, \
-								u64: U64_MAX, \
+								u8 *: U8_MAX, \
+								u16 *: U16_MAX, \
+								u32 *: U32_MAX, \
+								u64 *: U64_MAX, \
 								default: 0U)) { \
 				ret = -EOVERFLOW;			\
 				break;					\
-- 
2.34.1