#ifndef _SCSI_SCSI_DRIVER_H #define _SCSI_SCSI_DRIVER_H #include struct module; struct request; struct scsi_cmnd; struct scsi_device; struct scsi_driver { struct device_driver gendrv; void (*rescan)(struct device *); int (*init_command)(struct scsi_cmnd *); void (*uninit_command)(struct scsi_cmnd *); int (*done)(struct scsi_cmnd *); int (*eh_action)(struct scsi_cmnd *, int); }; #define to_scsi_driver(drv) \ container_of((drv), struct scsi_driver, gendrv) extern int scsi_register_driver(struct device_driver *); #define scsi_unregister_driver(drv) \ driver_unregister(drv); extern int scsi_register_interface(struct class_interface *); #define scsi_unregister_interface(intf) \ class_interface_unregister(intf) #endif /* _SCSI_SCSI_DRIVER_H */ a href='/cgit.cgi/linux/net-next.git/'>net-next.git
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 /include/net/atmclip.h
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 'include/net/atmclip.h')