6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jim Quinlan james.quinlan@broadcom.com
[ Upstream commit b7de1b60ecab2f7b6f05d8116e93228a0bbb8563 ]
The platform supports enabling and disabling regulators only on ports below the Root Complex.
Thus, we need to verify this both when adding and removing the bus, otherwise regulators may be disabled prematurely when a bus further down the topology is removed.
Fixes: 9e6be018b263 ("PCI: brcmstb: Enable child bus device regulators from DT") Signed-off-by: Jim Quinlan james.quinlan@broadcom.com Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Link: https://lore.kernel.org/r/20250214173944.47506-6-james.quinlan@broadcom.com [kwilczynski: commit log] Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pcie-brcmstb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index e39c61e17d86c..44d385f5c27cd 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -1156,7 +1156,7 @@ static void brcm_pcie_remove_bus(struct pci_bus *bus) struct subdev_regulators *sr = pcie->sr; struct device *dev = &bus->dev;
- if (!sr) + if (!sr || !bus->parent || !pci_is_root_bus(bus->parent)) return;
if (regulator_bulk_disable(sr->num_supplies, sr->supplies))