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authorChristophe Leroy <christophe.leroy@c-s.fr>2019-04-30 12:38:57 +0000
committerMichael Ellerman <mpe@ellerman.id.au>2019-05-03 01:20:27 +1000
commitef4291243f51d0a69899ee2025de09578c0fcba8 (patch)
treed694201d997952f5a1d229fa43e0710d1e7b42db /arch/powerpc/kernel
parent90f204b9a1f2dc81904547a52ba976d3e84dcf59 (diff)
downloadlinux-ef4291243f51d0a69899ee2025de09578c0fcba8.tar.bz2
powerpc/fsl_booke: ensure SPEFloatingPointException() reenables interrupts
SPEFloatingPointException() is the only exception handler which 'forgets' to re-enable interrupts. This patch makes sure it does. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/traps.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 1fd45a8650e1..665f294725cb 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -2088,6 +2088,10 @@ void SPEFloatingPointException(struct pt_regs *regs)
int code = FPE_FLTUNK;
int err;
+ /* We restore the interrupt state now */
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+
flush_spe_to_thread(current);
spefscr = current->thread.spefscr;
@@ -2133,6 +2137,10 @@ void SPEFloatingPointRoundException(struct pt_regs *regs)
extern int speround_handler(struct pt_regs *regs);
int err;
+ /* We restore the interrupt state now */
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+
preempt_disable();
if (regs->msr & MSR_SPE)
giveup_spe(current);