x86/pci: Return pci_mmconfig_add() failure early
If pci_mmconfig_alloc() fails, return the failure early so it's obvious that the failure is the exception, and the success is the normal case. No functional change intended. Link: https://lore.kernel.org/r/20231121183643.249006-9-helgaas@kernel.org Tested-by: Tomasz Pala <gotar@polanet.pl> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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@ -102,14 +102,15 @@ struct pci_mmcfg_region *__init pci_mmconfig_add(int segment, int start,
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struct pci_mmcfg_region *new;
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new = pci_mmconfig_alloc(segment, start, end, addr);
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if (new) {
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if (!new)
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return NULL;
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mutex_lock(&pci_mmcfg_lock);
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list_add_sorted(new);
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mutex_unlock(&pci_mmcfg_lock);
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pr_info("ECAM %pR (base %#lx) for domain %04x [bus %02x-%02x]\n",
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&new->res, (unsigned long)addr, segment, start, end);
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}
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return new;
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}
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