Commit-ID: 05e407603e527f9d808dd3866d3a17c2ce4dfcc5 Gitweb: http://git.kernel.org/tip/05e407603e527f9d808dd3866d3a17c2ce4dfcc5 Author: Daniel Kiper <dkiper@xxxxxxxxxxxx> AuthorDate: Fri, 20 Aug 2010 00:46:16 +0200 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Fri, 20 Aug 2010 10:18:28 +0200 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@xxxxxxxxxxxx> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx Cc: konrad.wilk@xxxxxxxxxx Cc: jeremy@xxxxxxxx Cc: <stable@xxxxxxxxxx> # .35.x, .34.x, .33.x, .32.x LKML-Reference: <20100819224616.GB9967@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- 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 4dc0084..f1efeba 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; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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