linux/drivers/peci/sysfs.c
Greg Kroah-Hartman 75cff725d9 driver core: bus: mark the struct bus_type for sysfs callbacks as constant
struct bus_type should never be modified in a sysfs callback as there is
nothing in the structure to modify, and frankly, the structure is almost
never used in a sysfs callback, so mark it as constant to allow struct
bus_type to be moved to read-only memory.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Ben Widawsky <bwidawsk@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Hu Haowen <src.res@email.cn>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Stuart Yoder <stuyoder@gmail.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Acked-by: Ilya Dryomov <idryomov@gmail.com> # rbd
Acked-by: Ira Weiny <ira.weiny@intel.com> # cxl
Reviewed-by: Alex Shi <alexs@kernel.org>
Acked-by: Iwona Winiarska <iwona.winiarska@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>	# pci
Acked-by: Wei Liu <wei.liu@kernel.org>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com> # scsi
Link: https://lore.kernel.org/r/20230313182918.1312597-23-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-23 13:20:40 +01:00

83 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2021 Intel Corporation
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/peci.h>
#include "internal.h"
static int rescan_controller(struct device *dev, void *data)
{
if (dev->type != &peci_controller_type)
return 0;
return peci_controller_scan_devices(to_peci_controller(dev));
}
static ssize_t rescan_store(const struct bus_type *bus, const char *buf, size_t count)
{
bool res;
int ret;
ret = kstrtobool(buf, &res);
if (ret)
return ret;
if (!res)
return count;
ret = bus_for_each_dev(&peci_bus_type, NULL, NULL, rescan_controller);
if (ret)
return ret;
return count;
}
static BUS_ATTR_WO(rescan);
static struct attribute *peci_bus_attrs[] = {
&bus_attr_rescan.attr,
NULL
};
static const struct attribute_group peci_bus_group = {
.attrs = peci_bus_attrs,
};
const struct attribute_group *peci_bus_groups[] = {
&peci_bus_group,
NULL
};
static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct peci_device *device = to_peci_device(dev);
bool res;
int ret;
ret = kstrtobool(buf, &res);
if (ret)
return ret;
if (res && device_remove_file_self(dev, attr))
peci_device_destroy(device);
return count;
}
static DEVICE_ATTR_IGNORE_LOCKDEP(remove, 0200, NULL, remove_store);
static struct attribute *peci_device_attrs[] = {
&dev_attr_remove.attr,
NULL
};
static const struct attribute_group peci_device_group = {
.attrs = peci_device_attrs,
};
const struct attribute_group *peci_device_groups[] = {
&peci_device_group,
NULL
};