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authorKees Cook <kees+treewide@kernel.org>2026-09-02 15:31:14 -0700
committerKees Cook <kees@kernel.org>2026-09-04 21:37:00 -0700
commit3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d (patch)
treec65086f9bdcd48c6360fb7cb4598bca084da1f32 /drivers/acpi/fan.h
downloadlinux-stable-3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d.tar.gz
linux-stable-3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d.zip
treewide: refresh kmalloc_obj() conversionsgrafted
This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook <kees+treewide@kernel.org>
Diffstat (limited to 'drivers/acpi/fan.h')
-rw-r--r--drivers/acpi/fan.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/acpi/fan.h b/drivers/acpi/fan.h
new file mode 100644
index 000000000..e20d6ad9d
--- /dev/null
+++ b/drivers/acpi/fan.h
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * ACPI fan device IDs are shared between the fan driver and the device power
+ * management code.
+ *
+ * Add new device IDs before the generic ACPI fan one.
+ */
+
+#ifndef _ACPI_FAN_H_
+#define _ACPI_FAN_H_
+
+#include <linux/device.h>
+#include <linux/limits.h>
+#include <linux/types.h>
+
+#define ACPI_FAN_DEVICE_IDS \
+ { .id = "INT3404" }, /* Fan */ \
+ { .id = "INTC1044" }, /* Fan for Tiger Lake generation */ \
+ { .id = "INTC1048" }, /* Fan for Alder Lake generation */ \
+ { .id = "INTC1063" }, /* Fan for Meteor Lake generation */ \
+ { .id = "INTC106A" }, /* Fan for Lunar Lake generation */ \
+ { .id = "INTC10A2" }, /* Fan for Raptor Lake generation */ \
+ { .id = "INTC10D6" }, /* Fan for Panther Lake generation */ \
+ { .id = "INTC10FE" }, /* Fan for Wildcat Lake generation */ \
+ { .id = "INTC10F5" }, /* Fan for Nova Lake generation */ \
+ { .id = "PNP0C0B" } /* Generic ACPI fan */
+
+#define ACPI_FPS_NAME_LEN 20
+
+struct acpi_fan_fps {
+ u64 control;
+ u64 trip_point;
+ u64 speed;
+ u64 noise_level;
+ u64 power;
+ char name[ACPI_FPS_NAME_LEN];
+ struct device_attribute dev_attr;
+};
+
+struct acpi_fan_fif {
+ u8 revision;
+ u8 fine_grain_ctrl;
+ u8 step_size;
+ u8 low_speed_notification;
+};
+
+struct acpi_fan_fst {
+ u64 revision;
+ u64 control;
+ u64 speed;
+};
+
+struct acpi_fan {
+ acpi_handle handle;
+ bool acpi4;
+ bool has_fst;
+ struct acpi_fan_fif fif;
+ struct acpi_fan_fps *fps;
+ int fps_count;
+ /* A value of 0 means that trippoint-related functions are not supported */
+ u32 fan_trip_granularity;
+#if IS_REACHABLE(CONFIG_HWMON)
+ struct device *hdev;
+#endif
+ struct thermal_cooling_device *cdev;
+ struct device_attribute fst_speed;
+ struct device_attribute fine_grain_control;
+};
+
+/**
+ * acpi_fan_speed_valid - Check if fan speed value is valid
+ * @speed: Speed value returned by the ACPI firmware
+ *
+ * Check if the fan speed value returned by the ACPI firmware is valid. This function is
+ * necessary as ACPI firmware implementations can return 0xFFFFFFFF to signal that the
+ * ACPI fan does not support speed reporting. Additionally, some buggy ACPI firmware
+ * implementations return a value larger than the 32-bit integer value defined by
+ * the ACPI specification when using placeholder values. Such invalid values are also
+ * detected by this function.
+ *
+ * Returns: True if the fan speed value is valid, false otherwise.
+ */
+static inline bool acpi_fan_speed_valid(u64 speed)
+{
+ return speed < U32_MAX;
+}
+
+/**
+ * acpi_fan_power_valid - Check if fan power value is valid
+ * @power: Power value returned by the ACPI firmware
+ *
+ * Check if the fan power value returned by the ACPI firmware is valid.
+ * See acpi_fan_speed_valid() for details.
+ *
+ * Returns: True if the fan power value is valid, false otherwise.
+ */
+static inline bool acpi_fan_power_valid(u64 power)
+{
+ return power < U32_MAX;
+}
+
+int acpi_fan_get_fst(acpi_handle handle, struct acpi_fan_fst *fst);
+int acpi_fan_create_attributes(struct acpi_device *device);
+void acpi_fan_delete_attributes(struct acpi_device *device);
+
+#if IS_REACHABLE(CONFIG_HWMON)
+int devm_acpi_fan_create_hwmon(struct device *dev);
+void acpi_fan_notify_hwmon(struct device *dev);
+#else
+static inline int devm_acpi_fan_create_hwmon(struct device *dev) { return 0; };
+static inline void acpi_fan_notify_hwmon(struct device *dev) { };
+#endif
+
+#endif