#include #include #define QNX4_DEBUG 0 #if QNX4_DEBUG #define QNX4DEBUG(X) printk X #else #define QNX4DEBUG(X) (void) 0 #endif struct qnx4_sb_info { unsigned int Version; /* may be useful */ struct qnx4_inode_entry *BitMap; /* useful */ }; struct qnx4_inode_info { struct qnx4_inode_entry raw; loff_t mmu_private; struct inode vfs_inode; }; extern struct inode *qnx4_iget(struct super_block *, unsigned long); extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags); extern unsigned long qnx4_count_free_blocks(struct super_block *sb); extern unsigned long qnx4_block_map(struct inode *inode, long iblock); extern const struct inode_operations qnx4_dir_inode_operations; extern const struct file_operations qnx4_dir_operations; extern int qnx4_is_free(struct super_block *sb, long block); static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb) { return sb->s_fs_info; } static inline struct qnx4_inode_info *qnx4_i(struct inode *inode) { return container_of(inode, struct qnx4_inode_info, vfs_inode); } static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode) { return &qnx4_i(inode)->raw; } te-remove' selected='selected'>nds-private-remove net-next plumbingsTobias Klauser
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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 /tools/perf/tests/llvm.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 'tools/perf/tests/llvm.c')