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    SubjectRe: [PATCH] efi/capsule: Make efi_capsule_pending() lockless
    On Wed, 04 May, at 02:20:42PM, Borislav Petkov wrote:
    > On Wed, May 04, 2016 at 12:46:05PM +0100, Matt Fleming wrote:
    > > But emergency_restart() is called after bust_spinlocks(0) which can
    > > reset oops_in_progress, so can't even use that to solve the panic
    > > case.
    >
    > Blergh.
    >
    > So I guess you need an explicit call efi_stop_capsules() somewhere in
    > the reboot path and be done with it. No reboot notifiers, no bla bla.
    > Just one big hammer which STFU the EFI.

    But you can't block in the reboot path and you can't guarantee you'll
    interrupt an in-progress EFI capsule update call that started before
    you entered the reboot path.

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