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| author | Daniel Kiper <dkiper@net-space.pl> | 2010-08-20 00:46:16 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-08-20 10:18:28 +0200 |
| commit | 05e407603e527f9d808dd3866d3a17c2ce4dfcc5 (patch) | |
| tree | e6b6b956d70b1a9624b11b8d597559ca4b2a8cdf /arch/x86 | |
| parent | d7c53c9e822a4fefa13a0cae76f3190bfd0d5c11 (diff) | |
| download | linux-3.10-05e407603e527f9d808dd3866d3a17c2ce4dfcc5.tar.gz linux-3.10-05e407603e527f9d808dd3866d3a17c2ce4dfcc5.tar.bz2 linux-3.10-05e407603e527f9d808dd3866d3a17c2ce4dfcc5.zip | |
x86, apic: Fix apic=debug boot crash
Fix a boot crash when apic=debug is used and the APIC is
not properly initialized.
This issue appears during Xen Dom0 kernel boot but the
fix is generic and the crash could occur on real hardware
as well.
Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
Cc: xen-devel@lists.xensource.com
Cc: konrad.wilk@oracle.com
Cc: jeremy@goop.org
Cc: <stable@kernel.org> # .35.x, .34.x, .33.x, .32.x
LKML-Reference: <20100819224616.GB9967@router-fw-old.local.net-space.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 4dc0084ec1b..f1efebaf551 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1728,6 +1728,8 @@ __apicdebuginit(void) print_IO_APIC(void) struct irq_pin_list *entry; cfg = desc->chip_data; + if (!cfg) + continue; entry = cfg->irq_2_pin; if (!entry) continue; |