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Tue, 3 Nov 2026 08:53:22 +0000 (GMT) Received: from shivang.bl1-in.ibm.com (unknown [9.123.12.247]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 3 Nov 2026 08:53:21 +0000 (GMT) From: Shivang Upadhyay To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Cc: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com, sourabhjain@linux.ibm.com, rppt@kernel.org, ruanjinjie@huawei.com, baoquan.he@linux.dev, Shivang Upadhyay , Anushree Mathur Subject: [PATCH] powerpc/crash: update fdt on cpu hotplug remove Date: Tue, 3 Nov 2026 14:23:19 +0530 Message-ID: <20261103085319.51480-1-shivangu@linux.ibm.com> X-Mailer: git-send-email 2.54.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=Mcr5KJ/f c=1 sm=1 tr=0 ts=6ae9a10a cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=S-6rMyIPvGFi4FMeT0EA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYxMTAzMDAzNCBTYWx0ZWRfX0rxcaEh/2Kz5 ZLGga6GYB7VlZs2Z6kNOdda082/rfEMKGGDXHyFM6y3NA6fP11xMn3ea7/rYV7zl3Op0cduAJ0Y CsdAgVRKgRkoDgFFPC2ZeMjCWit41TY= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTAzMDAzNCBTYWx0ZWRfX76o3wtPlmDLu w68FFedjwKrL4IWwd8dLZdb8DVKYG4DnC8dF400W2siSx9cO6D+Fekcv5D8QC/xmKn1914DNTRl HcysI2SA15OyWp+O7tnFCTDighhrQw5SQggMFJFYRE+J0TEbzqwx91dRuwS7pm7ClDnlSxWGdRt u8LwjGJQELpp7awcjS5AMoa0ONbYya+ZULk9aOOYXvy4ZfzqFPyAz3LV2Ynxh7xidietxnIyruw OAA5H9nixmWauk+DIMfFi81WbJEh/37iv8ZNnnyclptY//5h5+1JQEjWO1o8f0a63GPSgLeaZ9S Tv7Di4te11W+etZA0P9R4oshrHQzVgMq9SeI/zGSpojoyRW/5bFHCTDfNyzYHgQPBCEyiiFNZAt aDZEmtRXCz+Cr3Xeyz90k8tQradovcx1cYPszT1IbXM5ugSM8xRKfomU1ZzNOomxHSJQ9awDWNF ng5bBCc426qW7/Ks7Kg== X-Proofpoint-GUID: kyGgd7sLQHA9gL5cdsTSwh2-a3auW3vL X-Proofpoint-ORIG-GUID: cdzfwjm90R_Fs9ILAKWt3brLtMRv2zZM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-03_01,2026-11-02_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 priorityscore=1501 clxscore=1011 impostorscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611030034 Currently fdt for crash kernel is not updated on cpu hotplug remove, which can lead to the following XIVE warnings on the crash kernel bringup. [ 0.630795][ T1] xive: H_INT_GET_QUEUE_INFO cpu=16 prio=6 failed -55 [ 0.630912][ T1] xive: Error -55 getting queue info CPU 16 prio 6 [ 0.680899][ T1] xive: H_INT_GET_QUEUE_INFO cpu=17 prio=6 failed -55 [ 0.681000][ T1] xive: Error -55 getting queue info CPU 17 prio 6 Fixing this by updating crash fdt on cpu hotplug remove path also. Reported-by: Anushree Mathur Suggested-by: Sourabh Jain Signed-off-by: Shivang Upadhyay --- arch/powerpc/kexec/crash.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/powerpc/kexec/crash.c b/arch/powerpc/kexec/crash.c index 775895f31037..0ef10e39ae49 100644 --- a/arch/powerpc/kexec/crash.c +++ b/arch/powerpc/kexec/crash.c @@ -639,8 +639,6 @@ void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) switch (image->hp_action) { case KEXEC_CRASH_HP_REMOVE_CPU: - return; - case KEXEC_CRASH_HP_ADD_CPU: update_crash_fdt(image); break; -- 2.54.0