From: Suresh Siddha Date: Mon, 12 Mar 2012 18:36:33 +0000 (-0700) Subject: x86/ioapic: Add register level checks to detect bogus io-apic entries X-Git-Tag: v3.2.14~96 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=273fb194e86b795b08a724c7646d0f694949070b;p=pandora-kernel.git x86/ioapic: Add register level checks to detect bogus io-apic entries commit 73d63d038ee9f769f5e5b46792d227fe20e442c5 upstream. With the recent changes to clear_IO_APIC_pin() which tries to clear remoteIRR bit explicitly, some of the users started to see "Unable to reset IRR for apic .." messages. Close look shows that these are related to bogus IO-APIC entries which return's all 1's for their io-apic registers. And the above mentioned error messages are benign. But kernel should have ignored such io-apic's in the first place. Check if register 0, 1, 2 of the listed io-apic are all 1's and ignore such io-apic. Reported-by: Álvaro Castillo Tested-by: Jon Dufresne Signed-off-by: Suresh Siddha Cc: yinghai@kernel.org Cc: kernel-team@fedoraproject.org Cc: Josh Boyer Link: http://lkml.kernel.org/r/1331577393.31585.94.camel@sbsiddha-desk.sc.intel.com [ Performed minor cleanup of affected code. ] Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed