diff options
| author | Breno Leitao <leitao@linux.vnet.ibm.com> | 2010-02-03 05:56:41 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-13 13:20:17 -0700 |
| commit | 876c10addb8c8f064dae77b13f85d756df60bcf8 (patch) | |
| tree | 0f2470de2939a6b2e092d1a9b62c49088e6008c8 /arch/powerpc/platforms/pseries/eeh_event.c | |
| parent | d0cddca762a554fc1eb86d38df33cf20bba21243 (diff) | |
powerpc/eeh: Fix a bug when pci structure is null
commit 8d3d50bf1913561ef3b1f5b53115c5a481ba9b1e upstream.
During a EEH recover, the pci_dev structure can be null, mainly if an
eeh event is detected during cpi config operation. In this case, the
pci_dev will not be known (and will be null) the kernel will crash
with the following message:
Unable to handle kernel paging request for data at address 0x000000a0
Faulting instruction address: 0xc00000000006b8b4
Oops: Kernel access of bad area, sig: 11 [#1]
NIP [c00000000006b8b4] .eeh_event_handler+0x10c/0x1a0
LR [c00000000006b8a8] .eeh_event_handler+0x100/0x1a0
Call Trace:
[c0000003a80dff00] [c00000000006b8a8] .eeh_event_handler+0x100/0x1a0
[c0000003a80dff90] [c000000000031f1c] .kernel_thread+0x54/0x70
The bug occurs because pci_name() tries to access a null pointer.
This patch just guarantee that pci_name() is not called on Null pointers.
Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Linas Vepstas <linasvepstas@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/powerpc/platforms/pseries/eeh_event.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c index ddb80f5d850b..ec5df8f519c7 100644 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ b/arch/powerpc/platforms/pseries/eeh_event.c @@ -80,7 +80,7 @@ static int eeh_event_handler(void * dummy) eeh_mark_slot(event->dn, EEH_MODE_RECOVERING); printk(KERN_INFO "EEH: Detected PCI bus error on device %s\n", - pci_name(event->dev)); + eeh_pci_name(event->dev)); pdn = handle_eeh_events(event); |