parisc: don't enable irqs unconditionally in handle_interruption()

If the previous context had interrupts disabled, we should better
keep them disabled. This was noticed in the unwinding code where
a copy_from_kernel_nofault() triggered a page fault, and after
the fixup by the page fault handler interrupts where suddenly
enabled.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 690e6abcaf221a5dd7b1d28f9a26dc3544bb3bdf..b11fb26ce2998d7b8884c75ff05129c1f48c1db2 100644 (file)
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -481,7 +481,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 
        if (code == 1)
            pdc_console_restart();  /* switch back to pdc if HPMC */
-       else
+       else if (!irqs_disabled_flags(regs->gr[0]))
            local_irq_enable();
 
        /* Security check: