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PCI: host-common: Use struct pci_host_bridge.windows list directly 

There's no need to create a temporary resource list and then splice it to
struct pci_host_bridge.windows list. Just use pci_host_bridge.windows
directly. The necessary clean-up is already handled by the PCI core.

Link: https://lore.kernel.org/r/20200522234832.954484-4-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Will Deacon <will@kernel.org>
This commit is contained in:
Rob Herring 2020-05-22 17:48:20 -06:00 committed by Lorenzo Pieralisi
parent c322fa0b3f
commit e63434f4cc
1 changed files with 14 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/pci/controller/pci-host-common.c
View File

@ -21,7 +21,7 @@ static void gen_pci_unmap_cfg(void *ptr)
}
static struct pci_config_window *gen_pci_init(struct device *dev,
struct list_head *resources, const struct pci_ecam_ops *ops)
struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
{
int err;
struct resource cfgres;
@ -29,31 +29,25 @@ static struct pci_config_window *gen_pci_init(struct device *dev,
struct pci_config_window *cfg;
/* Parse our PCI ranges and request their resources */
err = pci_parse_request_of_pci_ranges(dev, resources, NULL, &bus_range);
err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL, &bus_range);
if (err)
return ERR_PTR(err);
err = of_address_to_resource(dev->of_node, 0, &cfgres);
if (err) {
dev_err(dev, "missing \"reg\" property\n");
goto err_out;
return ERR_PTR(err);
}
cfg = pci_ecam_create(dev, &cfgres, bus_range, ops);
if (IS_ERR(cfg)) {
err = PTR_ERR(cfg);
goto err_out;
}
if (IS_ERR(cfg))
return cfg;
err = devm_add_action_or_reset(dev, gen_pci_unmap_cfg, cfg);
if (err) {
goto err_out;
}
return cfg;
if (err)
return ERR_PTR(err);
err_out:
pci_free_resource_list(resources);
return ERR_PTR(err);
return cfg;
}
int pci_host_common_probe(struct platform_device *pdev)
@ -61,9 +55,7 @@ int pci_host_common_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct pci_host_bridge *bridge;
struct pci_config_window *cfg;
struct list_head resources;
const struct pci_ecam_ops *ops;
int ret;
ops = of_device_get_match_data(&pdev->dev);
if (!ops)
@ -76,7 +68,7 @@ int pci_host_common_probe(struct platform_device *pdev)
of_pci_check_probe_only();
/* Parse and map our Configuration Space windows */
cfg = gen_pci_init(dev, &resources, ops);
cfg = gen_pci_init(dev, bridge, ops);
if (IS_ERR(cfg))
return PTR_ERR(cfg);
@ -84,7 +76,6 @@ int pci_host_common_probe(struct platform_device *pdev)
if (!pci_has_flag(PCI_PROBE_ONLY))
pci_add_flags(PCI_REASSIGN_ALL_BUS);
list_splice_init(&resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->sysdata = cfg;
bridge->busnr = cfg->busr.start;
@ -92,24 +83,19 @@ int pci_host_common_probe(struct platform_device *pdev)
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_host_probe(bridge);
if (ret < 0) {
pci_free_resource_list(&resources);
return ret;
}
platform_set_drvdata(pdev, bridge);
platform_set_drvdata(pdev, bridge->bus);
return 0;
return pci_host_probe(bridge);
}
EXPORT_SYMBOL_GPL(pci_host_common_probe);
int pci_host_common_remove(struct platform_device *pdev)
{
struct pci_bus *bus = platform_get_drvdata(pdev);
struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
pci_lock_rescan_remove();
pci_stop_root_bus(bus);
pci_remove_root_bus(bus);
pci_stop_root_bus(bridge->bus);
pci_remove_root_bus(bridge->bus);
pci_unlock_rescan_remove();
return 0;