Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 07/21] powerpc: improve handling of unrecoverable system reset | Date | Tue, 2 Mar 2021 06:58:21 -0500 |
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From: Nicholas Piggin <npiggin@gmail.com>
[ Upstream commit 11cb0a25f71818ca7ab4856548ecfd83c169aa4d ]
If an unrecoverable system reset hits in process context, the system does not have to panic. Similar to machine check, call nmi_exit() before die().
Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210130130852.2952424-26-npiggin@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/powerpc/kernel/traps.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 1b2d84cb373b..2379c4bf3979 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -433,8 +433,11 @@ out: die("Unrecoverable nested System Reset", regs, SIGABRT); #endif /* Must die if the interrupt is not recoverable */ - if (!(regs->msr & MSR_RI)) + if (!(regs->msr & MSR_RI)) { + /* For the reason explained in die_mce, nmi_exit before die */ + nmi_exit(); die("Unrecoverable System Reset", regs, SIGABRT); + } if (!nested) nmi_exit(); -- 2.30.1
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