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Tue, 14 Jul 2026 17:30:23 +0000 (GMT) Received: from shivang.com (unknown [9.124.218.131]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 14 Jul 2026 17:30:23 +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, sourabhjain@linux.ibm.com, adri.vero.dev@gmail.com, adityag@linux.ibm.com, anushree.mathur@linux.vnet.ibm.com, Shivang Upadhyay Subject: [PATCH] ppc/fadump: collect dump if the collected size is lesser than reserved Date: Tue, 14 Jul 2026 23:00:10 +0530 Message-ID: <20260714173010.615682-1-shivangu@linux.ibm.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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=fOcJG5ae c=1 sm=1 tr=0 ts=6a567237 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=ERNNbWzvqkqraKjHjBsA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE0MDE3OCBTYWx0ZWRfX0YIv4tQKNAr1 vkCb1jLEpN65Y2Qd9Cuhu3PRKLj4JlsJhC1rruD4hG7OVQGJgqwajaHTzcvrOG1lmEyPCoN3nLe Zm8ZeW7BCkF8VKCyUOFZit7Y+0uPCaP+MdbZs4u0WGz33c7lGrucGRzm4EXjzWoL9o/PeMQ8/LD Qmvt5o/qJMMn7QBVHiFAvbZ+6lF3tX4A81YtN3cMtSj27pC3e1oQJF+CuYeKb7WfSaNViF7J5qE uHe6pPqUWXUKcvJ6SGplI990kSTLQTjFU82bkJHJLggiPKqBfQoNeXMAD6Bgbbu6bi1QmkMem77 /9j363J3Bxc7cqmZR+RdH7YwXi8oqTW5QWPehHCdy9kQDRZxcHqutvt/vIC6/gSDzgVYUKVcw1P 4eGwT8jE5mTFb7gwgw7M2DcN2AGnrDlvC5sOYDLRD6uXqEYJVbhw5HBvoPEB4XA6dUP4wMonCRk /uhBhUea4YUbDwsizZA== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE0MDE3OCBTYWx0ZWRfX5XPneJfjJXWt u2twjVLIWksl+l9pOlsj9yE/phtQba6UHp7HeY2Y+/JAt6iKl2A+qaLTkfZJaB65G7oC695R8Kn JGYiT/NP47Tsp3hpT/4iHJDZg615O2s= X-Proofpoint-GUID: zuapkpq2kWGyd_lCYlPYA1bmofNmUbse X-Proofpoint-ORIG-GUID: MgoM9eDk5Za2niy2HdggoFKWKS-k3z7y X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-14_04,2026-07-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 impostorscore=0 suspectscore=0 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607140178 When a machine is subjected to CPUs add/remove, using dlpar operations, the number of collected CPU_NOTES can change. As per PAPR, collected dump size should not be more than allocated size. Reflecting the same in source. Signed-off-by: Shivang Upadhyay --- arch/powerpc/platforms/pseries/rtas-fadump.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/rtas-fadump.c b/arch/powerpc/platforms/pseries/rtas-fadump.c index 3bb4ac2ab6cc..19a5adaf326b 100644 --- a/arch/powerpc/platforms/pseries/rtas-fadump.c +++ b/arch/powerpc/platforms/pseries/rtas-fadump.c @@ -469,7 +469,8 @@ static int __init rtas_fadump_process(struct fw_dump *fadump_conf) pr_err("Dump taken by platform is not valid (%d)\n", i); rc = -EINVAL; } - if (fdm_active->rgn[i].bytes_dumped != fdm_active->rgn[i].source_len) { + if (be64_to_cpu(fdm_active->rgn[i].bytes_dumped) + > be64_to_cpu(fdm_active->rgn[i].source_len)) { pr_err("Dump taken by platform is incomplete (%d)\n", i); rc = -EINVAL; } -- 2.54.0