On Mon, Dec 03, 2018 at 06:06:11PM +0000, James Morse wrote: > APEI is unable to do all of its error handling work in nmi-context, so > it defers non-fatal work onto the irq_work queue. arch_irq_work_raise() > sends an IPI to the calling cpu, but this is not guaranteed to be taken > before returning to user-space. > > Unless the exception interrupted a context with irqs-masked, > irq_work_run() can run immediately. Otherwise return -EINPROGRESS to > indicate ghes_notify_sea() found some work to do, but it hasn't > finished yet. > > With this apei_claim_sea() returning '0' means this external-abort was > also notification of a firmware-first RAS error, and that APEI has > processed the CPER records. > > Signed-off-by: James Morse <james.morse@xxxxxxx> > Reviewed-by: Punit Agrawal <punit.agrawal@xxxxxxx> > Tested-by: Tyler Baicar <tbaicar@xxxxxxxxxxxxxx> > CC: Xie XiuQi <xiexiuqi@xxxxxxxxxx> > CC: gengdongjiu <gengdongjiu@xxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
