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Commit 8e5a395a authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

PCI: Simplify config space size computation 



Restructure the logic so we return the config space size as soon as we know
it.  This reduces indentation, removes negations, and removes gotos.

No functional change.

Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 9f33a2ae

drivers/pci/probe.c

+10 −15
Original line number Diff line number Diff line
@@ -1107,14 +1107,11 @@ static int pci_cfg_space_size_ext(struct pci_dev *dev) 
	int pos = PCI_CFG_SPACE_SIZE;



	if (pci_read_config_dword(dev, pos, &status) != PCIBIOS_SUCCESSFUL)

		goto fail;

		return PCI_CFG_SPACE_SIZE;

	if (status == 0xffffffff || pci_ext_cfg_is_aliased(dev))

		goto fail;

		return PCI_CFG_SPACE_SIZE;



	return PCI_CFG_SPACE_EXP_SIZE;



 fail:

	return PCI_CFG_SPACE_SIZE;

}



int pci_cfg_space_size(struct pci_dev *dev)
@@ -1127,19 +1124,17 @@ int pci_cfg_space_size(struct pci_dev *dev) 
	if (class == PCI_CLASS_BRIDGE_HOST)

		return pci_cfg_space_size_ext(dev);



	if (!pci_is_pcie(dev)) {

	if (pci_is_pcie(dev))

		return pci_cfg_space_size_ext(dev);



	pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);

	if (!pos)

			goto fail;

		return PCI_CFG_SPACE_SIZE;



	pci_read_config_dword(dev, pos + PCI_X_STATUS, &status);

		if (!(status & (PCI_X_STATUS_266MHZ | PCI_X_STATUS_533MHZ)))

			goto fail;

	}



	if (status & (PCI_X_STATUS_266MHZ | PCI_X_STATUS_533MHZ))

		return pci_cfg_space_size_ext(dev);



 fail:

	return PCI_CFG_SPACE_SIZE;

}