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(unknown [10.28.36.165]) by maili.marvell.com (Postfix) with ESMTP id 78E8C3F7043; Tue, 14 Apr 2026 01:17:33 -0700 (PDT) From: Ratheesh Kannoth To: , , , CC: , , , , , , Ratheesh Kannoth , Bjorn Helgaas Subject: [PATCH v2] PCI: host-common: Request bus reassignment when not probe-only Date: Tue, 14 Apr 2026 13:47:30 +0530 Message-ID: <20260414081730.3864372-1-rkannoth@marvell.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE0MDA3NiBTYWx0ZWRfX1bhEJ+fcl08Y 1j7VyRaCWjL+jGuUFTyDO2i/VRXoA6wDPByq8YD9WCLrdXe/AtoWod6iDZ1ysbdW3Mq4PUXX3hF pjYwWI5Uc1z2epF0JHTxHJwU98G1H6ol7ZScNvDqWVo9xrRbEAUnk+3LGMPaV2ueVTHeir7J6jy xrofM0/UlLUUDIqbUgsRB2NdHbMo2KymjZdkZ3KxOALpq+m/iWmwghtdkBrqHYsLPZJmocOWRjj L9FMkURg90j6rUd86HcH75UEbkv1j1I4Tt7uRHjsXfmIBrKw12QKmPN740UV4iWAtHsn8iO0KE/ YGPB+4ZrX3g1KRnXn90RN5tLq8wLLxJtsXdVjwZHico9WuZ/y9ewusIh0znvxx3v45KLGyHzLzq BDHLgu+1dNwuz8o2UI2kwagvlPhA5eS0kypxIG3ZV+rtrTlYKtYE+av3lYxjApSL5MJLSpRvdyY TLsLRYfD+qDN4C472wA== X-Authority-Analysis: v=2.4 cv=F8NnsKhN c=1 sm=1 tr=0 ts=69ddf821 cx=c_pps a=rEv8fa4AjpPjGxpoe8rlIQ==:117 a=rEv8fa4AjpPjGxpoe8rlIQ==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=l0iWHRpgs5sLHlkKQ1IR:22 a=TtqV-g6YmW1Jfm2GSLaY:22 a=VwQbUJbxAAAA:8 a=M5GUcnROAAAA:8 a=Ikd4Dj_1AAAA:8 a=r5FkvgvYKeOTjkmYp6cA:9 a=OBjm3rFKGHvpk9ecZwUJ:22 X-Proofpoint-GUID: RYAIEn4WFZppLB0I8P04sw0j07gu5wz_ X-Proofpoint-ORIG-GUID: RYAIEn4WFZppLB0I8P04sw0j07gu5wz_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-14_02,2026-04-13_04,2025-10-01_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260414_011744_114936_71F18E33 X-CRM114-Status: GOOD ( 10.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org pci_host_common_init() is used by several generic ECAM host drivers. After PCI core changes around pci_flags and preserve_config, these hosts no longer opted into full bus number reassignment the way they did before. When PCI_PROBE_ONLY is not set, add PCI_REASSIGN_ALL_BUS so pci_scan_bridge_extend() takes the reassignment path: bus numbers can be assigned from firmware EA data (e.g. pci_ea_fixed_busnrs()). Skip the flag in probe-only mode so existing assignments are not overridden. CC: Bjorn Helgaas CC: Vidya Sagar CC: Manivannan Sadhasivam Fixes: 7246a4520b4b ("PCI: Use preserve_config in place of pci_flags") Link: https://lore.kernel.org/netdev/adcXzcz2wWJFw4d7@rkannoth-OptiPlex-7090/ Signed-off-by: Ratheesh Kannoth --- v1 -> v2 : https://lore.kernel.org/linux-pci/20260410142124.2673056-1-rkannoth@marvell.com/ --- drivers/pci/controller/pci-host-common.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c index d6258c1cffe5..99952fb7189b 100644 --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -68,6 +68,10 @@ int pci_host_common_init(struct platform_device *pdev, if (IS_ERR(cfg)) return PTR_ERR(cfg); + /* Do not reassign bus numbers if probe only */ + if (!pci_has_flag(PCI_PROBE_ONLY)) + pci_add_flags(PCI_REASSIGN_ALL_BUS); + bridge->sysdata = cfg; bridge->ops = (struct pci_ops *)&ops->pci_ops; bridge->enable_device = ops->enable_device; -- 2.43.0