From 487e34bfedac629ad8af0471ab72ab553871e810 Mon Sep 17 00:00:00 2001 From: JP Abgrall Date: Mon, 29 Apr 2013 16:07:00 -0700 Subject: [PATCH] ARM: fault: assume no context when IRQs are disabled during data abort. Bail out early if IRQs are disabled in do_page_fault or else [14415.157266] BUG: sleeping function called from invalid context at arch/arm/mm/fault.c:301 Russell King's idea from http://comments.gmane.org/gmane.linux.ports.arm.omap/59256 Signed-off-by: JP Abgrall --- arch/arm/mm/fault.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index daafcf121ce0..506c225c66cc 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -273,10 +273,10 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) local_irq_enable(); /* - * If we're in an interrupt or have no user + * If we're in an interrupt, or have no irqs, or have no user * context, we must not take the fault.. */ - if (faulthandler_disabled() || !mm) + if (faulthandler_disabled() || irqs_disabled() || !mm) goto no_context; if (user_mode(regs)) -- 2.34.1