From 1264d2e7b75bb94c081393d7d6216b3f0756c65b Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 29 Aug 2019 12:53:16 +0200 Subject: [PATCH] PCI: imx6: Propagate errors for optional regulators [ Upstream commit 2170a09fb4b0f66e06e5bcdcbc98c9ccbf353650 ] regulator_get_optional() can fail for a number of reasons besides probe deferral. It can for example return -ENOMEM if it runs out of memory as it tries to allocate data structures. Propagating only -EPROBE_DEFER is problematic because it results in these legitimately fatal errors being treated as "regulator not specified in DT". What we really want is to ignore the optional regulators only if they have not been specified in DT. regulator_get_optional() returns -ENODEV in this case, so that's the special case that we need to handle. So we propagate all errors, except -ENODEV, so that real failures will still cause the driver to fail probe. Signed-off-by: Thierry Reding Signed-off-by: Lorenzo Pieralisi Reviewed-by: Andrew Murray Cc: Richard Zhu Cc: Lucas Stach Cc: Shawn Guo Cc: Sascha Hauer Cc: Fabio Estevam Cc: kernel@pengutronix.de Cc: linux-imx@nxp.com Signed-off-by: Sasha Levin --- drivers/pci/controller/dwc/pci-imx6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 3826b444298c..3b2ceb566728 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -807,8 +807,8 @@ static int imx6_pcie_probe(struct platform_device *pdev) imx6_pcie->vpcie = devm_regulator_get_optional(&pdev->dev, "vpcie"); if (IS_ERR(imx6_pcie->vpcie)) { - if (PTR_ERR(imx6_pcie->vpcie) == -EPROBE_DEFER) - return -EPROBE_DEFER; + if (PTR_ERR(imx6_pcie->vpcie) != -ENODEV) + return PTR_ERR(imx6_pcie->vpcie); imx6_pcie->vpcie = NULL; } -- GitLab