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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Kees Cook](/assets/img/avatar_default.png)
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
427 lines
11 KiB
C
427 lines
11 KiB
C
/*
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* acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/uaccess.h>
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#include <linux/thermal.h>
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#include <linux/acpi.h>
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#include <linux/platform_device.h>
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#include <linux/sort.h>
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION("ACPI Fan Driver");
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MODULE_LICENSE("GPL");
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static int acpi_fan_probe(struct platform_device *pdev);
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static int acpi_fan_remove(struct platform_device *pdev);
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static const struct acpi_device_id fan_device_ids[] = {
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{"PNP0C0B", 0},
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{"INT3404", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, fan_device_ids);
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#ifdef CONFIG_PM_SLEEP
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static int acpi_fan_suspend(struct device *dev);
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static int acpi_fan_resume(struct device *dev);
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static const struct dev_pm_ops acpi_fan_pm = {
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.resume = acpi_fan_resume,
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.freeze = acpi_fan_suspend,
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.thaw = acpi_fan_resume,
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.restore = acpi_fan_resume,
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};
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#define FAN_PM_OPS_PTR (&acpi_fan_pm)
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#else
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#define FAN_PM_OPS_PTR NULL
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#endif
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struct acpi_fan_fps {
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u64 control;
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u64 trip_point;
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u64 speed;
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u64 noise_level;
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u64 power;
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};
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struct acpi_fan_fif {
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u64 revision;
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u64 fine_grain_ctrl;
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u64 step_size;
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u64 low_speed_notification;
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};
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struct acpi_fan {
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bool acpi4;
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struct acpi_fan_fif fif;
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struct acpi_fan_fps *fps;
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int fps_count;
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struct thermal_cooling_device *cdev;
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};
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static struct platform_driver acpi_fan_driver = {
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.probe = acpi_fan_probe,
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.remove = acpi_fan_remove,
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.driver = {
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.name = "acpi-fan",
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.acpi_match_table = fan_device_ids,
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.pm = FAN_PM_OPS_PTR,
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},
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};
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/* thermal cooling device callbacks */
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static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long
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*state)
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{
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struct acpi_device *device = cdev->devdata;
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struct acpi_fan *fan = acpi_driver_data(device);
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if (fan->acpi4)
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*state = fan->fps_count - 1;
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else
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*state = 1;
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return 0;
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}
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static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_fan *fan = acpi_driver_data(device);
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union acpi_object *obj;
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acpi_status status;
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int control, i;
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status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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dev_err(&device->dev, "Get fan state failed\n");
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return status;
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}
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obj = buffer.pointer;
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if (!obj || obj->type != ACPI_TYPE_PACKAGE ||
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obj->package.count != 3 ||
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obj->package.elements[1].type != ACPI_TYPE_INTEGER) {
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dev_err(&device->dev, "Invalid _FST data\n");
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status = -EINVAL;
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goto err;
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}
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control = obj->package.elements[1].integer.value;
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for (i = 0; i < fan->fps_count; i++) {
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/*
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* When Fine Grain Control is set, return the state
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* corresponding to maximum fan->fps[i].control
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* value compared to the current speed. Here the
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* fan->fps[] is sorted array with increasing speed.
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*/
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if (fan->fif.fine_grain_ctrl && control < fan->fps[i].control) {
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i = (i > 0) ? i - 1 : 0;
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break;
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} else if (control == fan->fps[i].control) {
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break;
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}
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}
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if (i == fan->fps_count) {
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dev_dbg(&device->dev, "Invalid control value returned\n");
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status = -EINVAL;
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goto err;
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}
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*state = i;
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err:
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kfree(obj);
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return status;
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}
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static int fan_get_state(struct acpi_device *device, unsigned long *state)
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{
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int result;
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int acpi_state = ACPI_STATE_D0;
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result = acpi_device_update_power(device, &acpi_state);
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if (result)
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return result;
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*state = acpi_state == ACPI_STATE_D3_COLD
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|| acpi_state == ACPI_STATE_D3_HOT ?
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0 : (acpi_state == ACPI_STATE_D0 ? 1 : -1);
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return 0;
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}
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static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
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*state)
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{
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struct acpi_device *device = cdev->devdata;
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struct acpi_fan *fan = acpi_driver_data(device);
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if (fan->acpi4)
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return fan_get_state_acpi4(device, state);
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else
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return fan_get_state(device, state);
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}
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static int fan_set_state(struct acpi_device *device, unsigned long state)
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{
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if (state != 0 && state != 1)
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return -EINVAL;
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return acpi_device_set_power(device,
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state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
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}
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static int fan_set_state_acpi4(struct acpi_device *device, unsigned long state)
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{
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struct acpi_fan *fan = acpi_driver_data(device);
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acpi_status status;
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if (state >= fan->fps_count)
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return -EINVAL;
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status = acpi_execute_simple_method(device->handle, "_FSL",
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fan->fps[state].control);
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if (ACPI_FAILURE(status)) {
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dev_dbg(&device->dev, "Failed to set state by _FSL\n");
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return status;
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}
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return 0;
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}
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static int
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fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
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{
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struct acpi_device *device = cdev->devdata;
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struct acpi_fan *fan = acpi_driver_data(device);
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if (fan->acpi4)
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return fan_set_state_acpi4(device, state);
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else
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return fan_set_state(device, state);
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}
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static const struct thermal_cooling_device_ops fan_cooling_ops = {
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.get_max_state = fan_get_max_state,
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.get_cur_state = fan_get_cur_state,
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.set_cur_state = fan_set_cur_state,
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};
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/* --------------------------------------------------------------------------
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* Driver Interface
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* --------------------------------------------------------------------------
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*/
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static bool acpi_fan_is_acpi4(struct acpi_device *device)
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{
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return acpi_has_method(device->handle, "_FIF") &&
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acpi_has_method(device->handle, "_FPS") &&
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acpi_has_method(device->handle, "_FSL") &&
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acpi_has_method(device->handle, "_FST");
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}
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static int acpi_fan_get_fif(struct acpi_device *device)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_fan *fan = acpi_driver_data(device);
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struct acpi_buffer format = { sizeof("NNNN"), "NNNN" };
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struct acpi_buffer fif = { sizeof(fan->fif), &fan->fif };
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union acpi_object *obj;
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acpi_status status;
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status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return status;
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obj = buffer.pointer;
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if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
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dev_err(&device->dev, "Invalid _FIF data\n");
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status = -EINVAL;
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goto err;
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}
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status = acpi_extract_package(obj, &format, &fif);
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if (ACPI_FAILURE(status)) {
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dev_err(&device->dev, "Invalid _FIF element\n");
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status = -EINVAL;
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}
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err:
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kfree(obj);
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return status;
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}
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static int acpi_fan_speed_cmp(const void *a, const void *b)
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{
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const struct acpi_fan_fps *fps1 = a;
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const struct acpi_fan_fps *fps2 = b;
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return fps1->speed - fps2->speed;
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}
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static int acpi_fan_get_fps(struct acpi_device *device)
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{
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struct acpi_fan *fan = acpi_driver_data(device);
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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int i;
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status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return status;
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obj = buffer.pointer;
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if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) {
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dev_err(&device->dev, "Invalid _FPS data\n");
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status = -EINVAL;
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goto err;
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}
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fan->fps_count = obj->package.count - 1; /* minus revision field */
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fan->fps = devm_kcalloc(&device->dev,
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fan->fps_count, sizeof(struct acpi_fan_fps),
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GFP_KERNEL);
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if (!fan->fps) {
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dev_err(&device->dev, "Not enough memory\n");
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status = -ENOMEM;
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goto err;
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}
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for (i = 0; i < fan->fps_count; i++) {
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struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" };
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struct acpi_buffer fps = { sizeof(fan->fps[i]), &fan->fps[i] };
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status = acpi_extract_package(&obj->package.elements[i + 1],
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&format, &fps);
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if (ACPI_FAILURE(status)) {
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dev_err(&device->dev, "Invalid _FPS element\n");
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break;
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}
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}
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/* sort the state array according to fan speed in increase order */
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sort(fan->fps, fan->fps_count, sizeof(*fan->fps),
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acpi_fan_speed_cmp, NULL);
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err:
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kfree(obj);
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return status;
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}
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static int acpi_fan_probe(struct platform_device *pdev)
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{
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int result = 0;
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struct thermal_cooling_device *cdev;
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struct acpi_fan *fan;
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struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
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char *name;
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fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL);
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if (!fan) {
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dev_err(&device->dev, "No memory for fan\n");
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return -ENOMEM;
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}
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device->driver_data = fan;
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platform_set_drvdata(pdev, fan);
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if (acpi_fan_is_acpi4(device)) {
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if (acpi_fan_get_fif(device) || acpi_fan_get_fps(device))
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goto end;
|
|
fan->acpi4 = true;
|
|
} else {
|
|
result = acpi_device_update_power(device, NULL);
|
|
if (result) {
|
|
dev_err(&device->dev, "Failed to set initial power state\n");
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (!strncmp(pdev->name, "PNP0C0B", strlen("PNP0C0B")))
|
|
name = "Fan";
|
|
else
|
|
name = acpi_device_bid(device);
|
|
|
|
cdev = thermal_cooling_device_register(name, device,
|
|
&fan_cooling_ops);
|
|
if (IS_ERR(cdev)) {
|
|
result = PTR_ERR(cdev);
|
|
goto end;
|
|
}
|
|
|
|
dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id);
|
|
|
|
fan->cdev = cdev;
|
|
result = sysfs_create_link(&pdev->dev.kobj,
|
|
&cdev->device.kobj,
|
|
"thermal_cooling");
|
|
if (result)
|
|
dev_err(&pdev->dev, "Failed to create sysfs link 'thermal_cooling'\n");
|
|
|
|
result = sysfs_create_link(&cdev->device.kobj,
|
|
&pdev->dev.kobj,
|
|
"device");
|
|
if (result)
|
|
dev_err(&pdev->dev, "Failed to create sysfs link 'device'\n");
|
|
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
static int acpi_fan_remove(struct platform_device *pdev)
|
|
{
|
|
struct acpi_fan *fan = platform_get_drvdata(pdev);
|
|
|
|
sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling");
|
|
sysfs_remove_link(&fan->cdev->device.kobj, "device");
|
|
thermal_cooling_device_unregister(fan->cdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int acpi_fan_suspend(struct device *dev)
|
|
{
|
|
struct acpi_fan *fan = dev_get_drvdata(dev);
|
|
if (fan->acpi4)
|
|
return 0;
|
|
|
|
acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int acpi_fan_resume(struct device *dev)
|
|
{
|
|
int result;
|
|
struct acpi_fan *fan = dev_get_drvdata(dev);
|
|
|
|
if (fan->acpi4)
|
|
return 0;
|
|
|
|
result = acpi_device_update_power(ACPI_COMPANION(dev), NULL);
|
|
if (result)
|
|
dev_err(dev, "Error updating fan power state\n");
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
module_platform_driver(acpi_fan_driver);
|