Revision 80ef4464d5e27408685e609d389663aad46644b9 authored by Robert Richter on 20 March 2019, 18:57:23 UTC, committed by Joerg Roedel on 22 March 2019, 11:01:58 UTC
If a 32 bit allocation request is too big to possibly succeed, it early exits with a failure and then should never update max32_alloc_ size. This patch fixes current code, now the size is only updated if the slow path failed while walking the tree. Without the fix the allocation may enter the slow path again even if there was a failure before of a request with the same or a smaller size. Cc: <stable@vger.kernel.org> # 4.20+ Fixes: bee60e94a1e2 ("iommu/iova: Optimise attempts to allocate iova from 32bit address range") Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Robert Richter <rrichter@marvell.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
1 parent 4e50ce0
pwm-lpss-platform.c
/*
* Intel Low Power Subsystem PWM controller driver
*
* Copyright (C) 2014, Intel Corporation
*
* Derived from the original pwm-lpss.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include "pwm-lpss.h"
/* BayTrail */
static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
.clk_rate = 25000000,
.npwm = 1,
.base_unit_bits = 16,
};
/* Braswell */
static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
.clk_rate = 19200000,
.npwm = 1,
.base_unit_bits = 16,
.other_devices_aml_touches_pwm_regs = true,
};
/* Broxton */
static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = {
.clk_rate = 19200000,
.npwm = 4,
.base_unit_bits = 22,
.bypass = true,
};
static int pwm_lpss_probe_platform(struct platform_device *pdev)
{
const struct pwm_lpss_boardinfo *info;
const struct acpi_device_id *id;
struct pwm_lpss_chip *lpwm;
struct resource *r;
id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
if (!id)
return -ENODEV;
info = (const struct pwm_lpss_boardinfo *)id->driver_data;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
lpwm = pwm_lpss_probe(&pdev->dev, r, info);
if (IS_ERR(lpwm))
return PTR_ERR(lpwm);
platform_set_drvdata(pdev, lpwm);
dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_SMART_PREPARE);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
return 0;
}
static int pwm_lpss_remove_platform(struct platform_device *pdev)
{
struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
return pwm_lpss_remove(lpwm);
}
static int pwm_lpss_prepare(struct device *dev)
{
struct pwm_lpss_chip *lpwm = dev_get_drvdata(dev);
/*
* If other device's AML code touches the PWM regs on suspend/resume
* force runtime-resume the PWM controller to allow this.
*/
if (lpwm->info->other_devices_aml_touches_pwm_regs)
return 0; /* Force runtime-resume */
return 1; /* If runtime-suspended leave as is */
}
static const struct dev_pm_ops pwm_lpss_platform_pm_ops = {
.prepare = pwm_lpss_prepare,
SET_SYSTEM_SLEEP_PM_OPS(pwm_lpss_suspend, pwm_lpss_resume)
};
static const struct acpi_device_id pwm_lpss_acpi_match[] = {
{ "80860F09", (unsigned long)&pwm_lpss_byt_info },
{ "80862288", (unsigned long)&pwm_lpss_bsw_info },
{ "80862289", (unsigned long)&pwm_lpss_bsw_info },
{ "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
{ },
};
MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
static struct platform_driver pwm_lpss_driver_platform = {
.driver = {
.name = "pwm-lpss",
.acpi_match_table = pwm_lpss_acpi_match,
.pm = &pwm_lpss_platform_pm_ops,
},
.probe = pwm_lpss_probe_platform,
.remove = pwm_lpss_remove_platform,
};
module_platform_driver(pwm_lpss_driver_platform);
MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:pwm-lpss");
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