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| author | Shawn Lin <shawn.lin@rock-chips.com> | 2016-03-07 12:32:21 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-03-11 12:21:47 -0600 |
| commit | 25de15c958e98747c7dada3983474bd4b8ae381b (patch) | |
| tree | d23aebaee8b22fede7ee157716d6acda59a11136 /drivers/pci | |
| parent | 92e963f50fc74041b5e9e744c330dca48e04f08d (diff) | |
| download | linux-25de15c958e98747c7dada3983474bd4b8ae381b.tar.bz2 | |
PCI: keystone: Defer probing if devm_phy_get() returns -EPROBE_DEFER
A SerDes PHY is optional, so if devm_phy_get() doesn't find one at all,
that's fine. But if devm_phy_get() finds a PHY that doesn't have a driver
yet, it returns -EPROBE_DEFER. In that case, defer probing the Keystone
driver. We may be able to load it later after a PHY driver is loaded.
[bhelgaas: changelog, check for -EPROBE_DEFER first]
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pci-keystone.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c index 0aa81bd3de12..cd7034523f52 100644 --- a/drivers/pci/host/pci-keystone.c +++ b/drivers/pci/host/pci-keystone.c @@ -359,6 +359,9 @@ static int __init ks_pcie_probe(struct platform_device *pdev) /* initialize SerDes Phy if present */ phy = devm_phy_get(dev, "pcie-phy"); + if (PTR_ERR_OR_ZERO(phy) == -EPROBE_DEFER) + return PTR_ERR(phy); + if (!IS_ERR_OR_NULL(phy)) { ret = phy_init(phy); if (ret < 0) |