summaryrefslogtreecommitdiff
path: root/arch/x86/kernel/smpboot.c
diff options
context:
space:
mode:
authorSuresh Siddha <suresh.b.siddha@intel.com>2011-08-25 12:01:12 -0700
committerIngo Molnar <mingo@elte.hu>2011-09-21 10:26:26 +0200
commite57253a81d9cc7049e9e43bd806ce6cdd297ec1c (patch)
tree979900bd7e7fe8fd60e28fcd79b2652bd92fa84a /arch/x86/kernel/smpboot.c
parent1e75b31d638d5242ca8e9771dfdcbd28a5f041df (diff)
x86, ioapic: Restore the mask bit correctly in eoi_ioapic_irq()
For older IO-APIC's, we were clearing the remote-IRR by changing the RTE trigger mode to edge and then back to level. We wanted to mask the RTE during this process, so we were essentially doing mask+edge and then to unmask+level. As part of the commit ca64c47cecd0321b2e0dcbd7aaff44b68ce20654, we moved this EOI process earlier where the IO-APIC RTE is masked. So we were wrongly unmasking it in the eoi_ioapic_irq(). So change the remote-IRR clear sequence in eoi_ioapic_irq() to mask + edge and then restore the previous RTE entry which will restore the mask status as well as the level trigger. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Thomas Renninger <trenn@suse.de> Cc: Rafael Wysocki <rjw@novell.com> Cc: lchiquitto@novell.com Cc: jbeulich@novell.com Cc: yinghai@kernel.org Link: http://lkml.kernel.org/r/20110825190657.210286410@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
0 files changed, 0 insertions, 0 deletions