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PCI: iproc: Propagate errors for optional PHYs 

devm_phy_get() 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 devres structures. Propagating only -EPROBE_DEFER is
problematic because it results in these legitimately fatal errors being
treated as "PHY not specified in DT".

What we really want is to ignore the optional PHYs only if they have not
been specified in DT. devm_phy_optional_get() is a function that exactly
does what's required here, so use that instead.

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: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: bcm-kernel-feedback-list@broadcom.com
This commit is contained in:
Thierry Reding 2019-08-29 12:53:19 +02:00 committed by Lorenzo Pieralisi
parent 8f9e1641ba
commit c1e33666c9
1 changed files with 3 additions and 6 deletions
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9
drivers/pci/controller/pcie-iproc-platform.c
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@ -93,12 +93,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
/* PHY use is optional */
pcie->phy = devm_phy_get(dev, "pcie-phy");
if (IS_ERR(pcie->phy)) {
if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
return -EPROBE_DEFER;
pcie->phy = NULL;
}
pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
if (IS_ERR(pcie->phy))
return PTR_ERR(pcie->phy);
ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources,
&iobase);