/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * extent_map.h * * In-memory file extent mappings for OCFS2. * * Copyright (C) 2004 Oracle. All rights reserved. * * 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. * * 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. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef _EXTENT_MAP_H #define _EXTENT_MAP_H struct ocfs2_extent_map_item { unsigned int ei_cpos; unsigned int ei_phys; unsigned int ei_clusters; unsigned int ei_flags; struct list_head ei_list; }; #define OCFS2_MAX_EXTENT_MAP_ITEMS 3 struct ocfs2_extent_map { unsigned int em_num_items; struct list_head em_list; }; void ocfs2_extent_map_init(struct inode *inode); void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster); void ocfs2_extent_map_insert_rec(struct inode *inode, struct ocfs2_extent_rec *rec); int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, u32 *num_clusters, unsigned int *extent_flags); int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, u64 *ret_count, unsigned int *extent_flags); int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 map_start, u64 map_len); int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, u32 *num_clusters, struct ocfs2_extent_list *el, unsigned int *extent_flags); int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, struct buffer_head *bhs[], int flags, int (*validate)(struct super_block *sb, struct buffer_head *bh)); int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci, struct ocfs2_extent_list *el, struct buffer_head *eb_bh, u32 v_cluster, u32 *num_clusters); static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, struct buffer_head **bh, int (*validate)(struct super_block *sb, struct buffer_head *bh)) { int status = 0; if (bh == NULL) { printk("ocfs2: bh == NULL\n"); status = -EINVAL; goto bail; } status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); bail: return status; } #endif /* _EXTENT_MAP_H */ ''/>
path: root/sound/pci/rme9652/rme9652.c
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /sound/pci/rme9652/rme9652.c
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'sound/pci/rme9652/rme9652.c')