Messages in this thread Patch in this message | | | From | Matthew Garrett <> | Subject | [PATCH] ipmi: Make sure drivers were registered before unregistering them | Date | Thu, 10 Jun 2010 13:53:26 -0400 |
| |
The ipmi code will never register a PCI or Open Firmware driver if a hardcoded device is provided by the user. This can cause us to attempt to unregister a driver that was never registered, resulting in an oops. Keep track of registration in order to avoid this.
Signed-off-by: Matthew Garrett <mjg@redhat.com> --- drivers/char/ipmi/ipmi_si_intf.c | 21 +++++++++++++++++---- 1 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 35603dd..311f85b 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -302,6 +302,12 @@ struct smi_info { static int force_kipmid[SI_MAX_PARMS]; static int num_force_kipmid; +#ifdef CONFIG_PCI +static int pci_registered; +#endif +#ifdef CONFIG_PPC_OF +static int of_registered; +#endif static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; static int num_max_busy_us; @@ -3314,6 +3320,8 @@ static __devinit int init_ipmi_si(void) rv = pci_register_driver(&ipmi_pci_driver); if (rv) printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv); + else + pci_registered = 1; #endif #ifdef CONFIG_ACPI @@ -3330,6 +3338,7 @@ static __devinit int init_ipmi_si(void) #ifdef CONFIG_PPC_OF of_register_platform_driver(&ipmi_of_platform_driver); + of_registered = 1; #endif /* We prefer devices with interrupts, but in the case of a machine @@ -3383,11 +3392,13 @@ static __devinit int init_ipmi_si(void) if (unload_when_empty && list_empty(&smi_infos)) { mutex_unlock(&smi_infos_lock); #ifdef CONFIG_PCI - pci_unregister_driver(&ipmi_pci_driver); + if (pci_registered) + pci_unregister_driver(&ipmi_pci_driver); #endif #ifdef CONFIG_PPC_OF - of_unregister_platform_driver(&ipmi_of_platform_driver); + if (of_registered) + of_unregister_platform_driver(&ipmi_of_platform_driver); #endif driver_unregister(&ipmi_driver.driver); printk(KERN_WARNING PFX @@ -3478,14 +3489,16 @@ static __exit void cleanup_ipmi_si(void) return; #ifdef CONFIG_PCI - pci_unregister_driver(&ipmi_pci_driver); + if (pci_registered) + pci_unregister_driver(&ipmi_pci_driver); #endif #ifdef CONFIG_ACPI pnp_unregister_driver(&ipmi_pnp_driver); #endif #ifdef CONFIG_PPC_OF - of_unregister_platform_driver(&ipmi_of_platform_driver); + if (of_registered) + of_unregister_platform_driver(&ipmi_of_platform_driver); #endif mutex_lock(&smi_infos_lock); -- 1.7.0.1
| |