/* * Copyright 2014 Google, Inc. * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include "internal.h" static DEFINE_MUTEX(pmsg_lock); static ssize_t write_pmsg(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { u64 id; int ret; if (!count) return 0; /* check outside lock, page in any data. write_buf_user also checks */ if (!access_ok(VERIFY_READ, buf, count)) return -EFAULT; mutex_lock(&pmsg_lock); ret = psinfo->write_buf_user(PSTORE_TYPE_PMSG, 0, &id, 0, buf, 0, count, psinfo); mutex_unlock(&pmsg_lock); return ret ? ret : count; } static const struct file_operations pmsg_fops = { .owner = THIS_MODULE, .llseek = noop_llseek, .write = write_pmsg, }; static struct class *pmsg_class; static int pmsg_major; #define PMSG_NAME "pmsg" #undef pr_fmt #define pr_fmt(fmt) PMSG_NAME ": " fmt static char *pmsg_devnode(struct device *dev, umode_t *mode) { if (mode) *mode = 0220; return NULL; } void pstore_register_pmsg(void) { struct device *pmsg_device; pmsg_major = register_chrdev(0, PMSG_NAME, &pmsg_fops); if (pmsg_major < 0) { pr_err("register_chrdev failed\n"); goto err; } pmsg_class = class_create(THIS_MODULE, PMSG_NAME); if (IS_ERR(pmsg_class)) { pr_err("device class file already in use\n"); goto err_class; } pmsg_class->devnode = pmsg_devnode; pmsg_device = device_create(pmsg_class, NULL, MKDEV(pmsg_major, 0), NULL, "%s%d", PMSG_NAME, 0); if (IS_ERR(pmsg_device)) { pr_err("failed to create device\n"); goto err_device; } return; err_device: class_destroy(pmsg_class); err_class: unregister_chrdev(pmsg_major, PMSG_NAME); err: return; } void pstore_unregister_pmsg(void) { device_destroy(pmsg_class, MKDEV(pmsg_major, 0)); class_destroy(pmsg_class); unregister_chrdev(pmsg_major, PMSG_NAME); } fa1aeec889934'/>
path: root/drivers/usb/serial/cp210x.c
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authorJack Morgenstein <jackm@dev.mellanox.co.il>2017-01-15 20:15:00 +0200
committerDoug Ledford <dledford@redhat.com>2017-01-27 14:29:04 -0500
commitb4cfe3971f6eab542dd7ecc398bfa1aeec889934 (patch)
treec7ad49d05da0535170c8e7710cd44ae1cecc271f /drivers/usb/serial/cp210x.c
parent2d4b21e0a2913612274a69a3ba1bfee4cffc6e77 (diff)
RDMA/cma: Fix unknown symbol when CONFIG_IPV6 is not enabled
If IPV6 has not been enabled in the underlying kernel, we must avoid calling IPV6 procedures in rdma_cm.ko. This requires using "IS_ENABLED(CONFIG_IPV6)" in "if" statements surrounding any code which calls external IPV6 procedures. In the instance fixed here, procedure cma_bind_addr() called ipv6_addr_type() -- which resulted in calling external procedure __ipv6_addr_type(). Fixes: 6c26a77124ff ("RDMA/cma: fix IPv6 address resolution") Cc: <stable@vger.kernel.org> # v4.2+ Cc: Spencer Baugh <sbaugh@catern.com> Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Reviewed-by: Moni Shoua <monis@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/usb/serial/cp210x.c')