lkml.org 
[lkml]   [2019]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH AUTOSEL 5.3 29/49] PCI: imx6: Propagate errors for optional regulators
    Date
    From: Thierry Reding <treding@nvidia.com>

    [ 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 <treding@nvidia.com>
    Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
    Reviewed-by: Andrew Murray <andrew.murray@arm.com>
    Cc: Richard Zhu <hongxing.zhu@nxp.com>
    Cc: Lucas Stach <l.stach@pengutronix.de>
    Cc: Shawn Guo <shawnguo@kernel.org>
    Cc: Sascha Hauer <s.hauer@pengutronix.de>
    Cc: Fabio Estevam <festevam@gmail.com>
    Cc: kernel@pengutronix.de
    Cc: linux-imx@nxp.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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 9b5cb5b703890..aabf22eaa6b91 100644
    --- a/drivers/pci/controller/dwc/pci-imx6.c
    +++ b/drivers/pci/controller/dwc/pci-imx6.c
    @@ -1173,8 +1173,8 @@ 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;
    }

    --
    2.20.1
    \
     
     \ /
      Last update: 2019-09-29 19:43    [W:2.916 / U:0.516 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site