From 540e07c67efe42ef6b6be4f1956931e676d58a15 Mon Sep 17 00:00:00 2001 From: Michael Neuling <mikey@neuling.org> Date: Mon, 24 Jun 2013 15:47:23 +1000 Subject: [PATCH] powerpc/hw_brk: Fix clearing of extraneous IRQ In 9422de3 "powerpc: Hardware breakpoints rewrite to handle non DABR breakpoint registers" we changed the way we mark extraneous irqs with this: - info->extraneous_interrupt = !((bp->attr.bp_addr <= dar) && - (dar - bp->attr.bp_addr < bp->attr.bp_len)); + if (!((bp->attr.bp_addr <= dar) && + (dar - bp->attr.bp_addr < bp->attr.bp_len))) + info->type |= HW_BRK_TYPE_EXTRANEOUS_IRQ; Unfortunately this is bogus as it never clears extraneous IRQ if it's already set. This correctly clears extraneous IRQ before possibly setting it. Signed-off-by: Michael Neuling <mikey@neuling.org> Reported-by: Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com> Cc: stable@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- arch/powerpc/kernel/hw_breakpoint.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index a949bdfc9623b5..1150ae7c22c310 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -250,6 +250,7 @@ int __kprobes hw_breakpoint_handler(struct die_args *args) * we still need to single-step the instruction, but we don't * generate an event. */ + info->type &= ~HW_BRK_TYPE_EXTRANEOUS_IRQ; if (!((bp->attr.bp_addr <= dar) && (dar - bp->attr.bp_addr < bp->attr.bp_len))) info->type |= HW_BRK_TYPE_EXTRANEOUS_IRQ; -- GitLab