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| author | Bjorn Helgaas <bhelgaas@google.com> | 2017-02-01 01:35:42 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-02-01 01:35:42 +0300 |
| commit | ff1677e231651205e7e19770a677057dea05cb70 (patch) | |
| tree | acdcb9fe02bc3843b94ed7bee561de154f86496b /drivers/pci | |
| parent | 8267b07526cabe2e2afc834a138ece8644af87ed (diff) | |
| download | linux-ff1677e231651205e7e19770a677057dea05cb70.tar.xz | |
PCI: rcar: Use of_device_get_match_data() to simplify probe
This is a DT-only driver, so the only way to call rcar_pcie_probe() is to
match an entry in rcar_pcie_of_match[], so of_id cannot be NULL.
Furthermore, of_id->data can only be NULL if an rcar_pcie_of_match[] entry
has a NULL .data member. That's a driver defect, and we don't want to
return -EINVAL, which is easy to ignore. We'd rather take the NULL pointer
dereference so we notice the problem and fix it.
Use of_device_get_match_data() to retrieve the hw_init_fn pointer. No
functional change intended.
Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pcie-rcar.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 0d9b96c3c49d..cb07c45c1858 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -1125,7 +1125,6 @@ static int rcar_pcie_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct rcar_pcie *pcie; unsigned int data; - const struct of_device_id *of_id; int err; int (*hw_init_fn)(struct rcar_pcie *); @@ -1149,11 +1148,6 @@ static int rcar_pcie_probe(struct platform_device *pdev) if (err) return err; - of_id = of_match_device(rcar_pcie_of_match, dev); - if (!of_id || !of_id->data) - return -EINVAL; - hw_init_fn = of_id->data; - pm_runtime_enable(dev); err = pm_runtime_get_sync(dev); if (err < 0) { @@ -1162,6 +1156,7 @@ static int rcar_pcie_probe(struct platform_device *pdev) } /* Failure to get a link might just be that no cards are inserted */ + hw_init_fn = of_device_get_match_data(dev); err = hw_init_fn(pcie); if (err) { dev_info(dev, "PCIe link down\n"); |