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powerpc/powernv: Fix machine check reporting of async store errors
[ Upstream commit 3729e0e ] POWER9 and POWER10 asynchronous machine checks due to stores have their cause reported in SRR1 but SRR1[42] is set, which in other cases indicates DSISR cause. Check for these cases and clear SRR1[42], so the cause matching uses the i-side (SRR1) table. Fixes: 7b9f71f ("powerpc/64s: POWER9 machine check handler") Fixes: 201220b ("powerpc/powernv: Machine check handler for POWER10") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210517140355.2325406-1-npiggin@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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