From: Jim Quinlan Date: Fri, 14 Feb 2025 17:39:32 +0000 (-0500) Subject: PCI: brcmstb: Fix error path after a call to regulator_bulk_get() X-Git-Tag: block-6.15-20250403~40^2~13^2~5 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=3651ad5249c51cf7eee078e12612557040a6bdb4;p=linux-block.git PCI: brcmstb: Fix error path after a call to regulator_bulk_get() If the regulator_bulk_get() returns an error and no regulators are created, we need to set their number to zero. If we don't do this and the PCIe link up fails, a call to the regulator_bulk_free() will result in a kernel panic. While at it, print the error value, as we cannot return an error upwards as the kernel will WARN() on an error from add_bus(). Fixes: 9e6be018b263 ("PCI: brcmstb: Enable child bus device regulators from DT") Signed-off-by: Jim Quinlan Reviewed-by: Florian Fainelli Link: https://lore.kernel.org/r/20250214173944.47506-5-james.quinlan@broadcom.com [kwilczynski: commit log, use comma in the message to match style with other similar messages] Signed-off-by: Krzysztof Wilczyński --- diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 4e53d0da510b..7d1c6dc599da 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -1416,7 +1416,8 @@ static int brcm_pcie_add_bus(struct pci_bus *bus) ret = regulator_bulk_get(dev, sr->num_supplies, sr->supplies); if (ret) { - dev_info(dev, "No regulators for downstream device\n"); + dev_info(dev, "Did not get regulators, err=%d\n", ret); + pcie->sr = NULL; goto no_regulators; }