The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From d4af3c4b81f4cd5662baa6f1492f998d89783318 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson bjorn.andersson@linaro.org Date: Tue, 29 Oct 2019 10:15:39 -0700 Subject: [PATCH] arm64: cpufeature: Enable Qualcomm Falkor/Kryo errata 1003
With the introduction of 'cce360b54ce6 ("arm64: capabilities: Filter the entries based on a given mask")' the Qualcomm Falkor/Kryo errata 1003 is no long applied.
The result of not applying errata 1003 is that MSM8996 runs into various RCU stalls and fails to boot most of the times.
Give 1003 a "type" to ensure they are not filtered out in update_cpu_capabilities().
Fixes: cce360b54ce6 ("arm64: capabilities: Filter the entries based on a given mask") Cc: stable@vger.kernel.org Reported-by: Mark Brown broonie@kernel.org Suggested-by: Will Deacon will@kernel.org Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: Will Deacon will@kernel.org
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 6c3b10a41bd8..7f9b699969c7 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -816,6 +816,7 @@ const struct arm64_cpu_capabilities arm64_errata[] = { { .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003", .capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003, + .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, .matches = cpucap_multi_entry_cap_matches, .match_list = qcom_erratum_1003_list, },