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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-231d4afe8b0sm98325955ad.89.2025.05.21.17.50.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 May 2025 17:50:20 -0700 (PDT) From: Jie Gan To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Suzuki K Poulose , Mike Leach , James Clark Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] arm64: dts: qcom: qcs615: fix a crash issue caused by infinite loop for Coresight Date: Thu, 22 May 2025 08:50:16 +0800 Message-Id: <20250522005016.2148-1-jie.gan@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: SJflheDpyJNf0R80F-Q-sxf2XbGiQ4ZB X-Authority-Analysis: v=2.4 cv=J/Sq7BnS c=1 sm=1 tr=0 ts=682e74ce cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=dt9VzEwgFbYA:10 a=EUspDBNiAAAA:8 a=435hUyIJdIdCWuEgtuoA:9 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-ORIG-GUID: SJflheDpyJNf0R80F-Q-sxf2XbGiQ4ZB X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTIyMDAwNSBTYWx0ZWRfXxDWDCOU7RzsO RI1lH1IF4ZqHInLfx0QM5jYlkYKm7umHgzDtZNGNjb82tjnAtoKsQuzW8p+NLRkMLPizE803F+u ikb8zl0sSa09bZfT9qwvBvTDkixh6+hZj/V23JgcyvCogw9R8gbslTt4OJMEeWtxG4eydUks0ar 7C1QPqiFK7QW7eun6GrBIIXyeJvibduTOyEuElnkGjtBTEzWVlJvYigNJKLC72oG4oaQW3zpSCZ H2RDO6YTtq90ilj800JYUqEQqjOlYwZy3C38iOW29qp0j1b/AGAWo7RDsaQ43hpA7Yij8LEJ9MR U/Ehr9yy7HH9ej15T0SrZO3/A+20V6nOqN/oFFgp7EufWfzkaxexxS5G+RJmudOIKXJ0LMRS1UM nGZfjf9uXFFR767XYp4bPnSFQ9O474b2uUV1btr7xDiCFN0KmC7cpyIIe9co/jm2NFWqvr/h X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-22_01,2025-05-20_03,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1015 mlxlogscore=999 suspectscore=0 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505160000 definitions=main-2505220005 Content-Type: text/plain; charset="utf-8" An infinite loop has been created by the Coresight devices. When only a source device is enabled, the coresight_find_activated_sysfs_sink function is recursively invoked in an attempt to locate an active sink device, ultimately leading to a stack overflow and system crash. Therefore, disable the replicator1 to break the infinite loop and prevent a potential stack overflow. replicator1_out -> funnel_swao_in6 -> tmc_etf_swao_in -> tmc_etf= _swao_out | | replicator1_in replicat= or_swao_in | | replicator0_out1 replicat= or_swao_out0 | | replicator0_in funnel_i= n1_in3 | | tmc_etf_out <- tmc_etf_in <- funnel_merg_out <- funnel_merg_in1 <- funnel_i= n1_out [call trace] dump_backtrace+0x9c/0x128 show_stack+0x20/0x38 dump_stack_lvl+0x48/0x60 dump_stack+0x18/0x28 panic+0x340/0x3b0 nmi_panic+0x94/0xa0 panic_bad_stack+0x114/0x138 handle_bad_stack+0x34/0xb8 __bad_stack+0x78/0x80 coresight_find_activated_sysfs_sink+0x28/0xa0 [coresight] coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight] coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight] coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight] coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight] ... coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight] coresight_enable_sysfs+0x80/0x2a0 [coresight] side effect after the change: Only trace data originating from AOSS can reach the ETF_SWAO and EUD sinks. Fixes: bf469630552a ("arm64: dts: qcom: qcs615: Add coresight nodes") Signed-off-by: Jie Gan Acked-by: Suzuki K Poulose --- arch/arm64/boot/dts/qcom/qcs615.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/qcom/qcs615.dtsi b/arch/arm64/boot/dts/qco= m/qcs615.dtsi index f08ba09772f3..b67c1f8a1118 100644 --- a/arch/arm64/boot/dts/qcom/qcs615.dtsi +++ b/arch/arm64/boot/dts/qcom/qcs615.dtsi @@ -1902,6 +1902,7 @@ replicator@604a000 { =20 clocks =3D <&aoss_qmp>; clock-names =3D "apb_pclk"; + status =3D "disabled"; =20 in-ports { port { --=20 2.34.1