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 3651ad5249c51cf7eee078e12612557040a6bdb4 ]
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 james.quinlan@broadcom.com Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com 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 kwilczynski@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pcie-brcmstb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 54c440f09a7ab..e39c61e17d86c 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -1132,7 +1132,8 @@ 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; }