Commit a06cd74c authored by Alexander Gordeev's avatar Alexander Gordeev Committed by Bjorn Helgaas
Browse files

PCI/MSI: Rename pci_msi_check_device() to pci_msi_supported() 



Rename pci_msi_check_device() to pci_msi_supported() for clarity.  Note
that pci_msi_supported() returns true if MSI/MSI-X is supported, so code
like:

  if (pci_msi_supported(...))

reads naturally.

[bhelgaas: changelog, split to separate patch, reverse sense]
Signed-off-by: default avatarAlexander Gordeev <agordeev@redhat.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 27e20603

drivers/pci/msi.c

+12 −15
Original line number Diff line number Diff line
@@ -796,25 +796,24 @@ out_free: 
}



/**

 * pci_msi_check_device - check whether MSI may be enabled on a device

 * pci_msi_supported - check whether MSI may be enabled on a device

 * @dev: pointer to the pci_dev data structure of MSI device function

 * @nvec: how many MSIs have been requested ?

 * @type: are we checking for MSI or MSI-X ?

 *

 * Look at global flags, the device itself, and its parent buses

 * to determine if MSI/-X are supported for the device. If MSI/-X is

 * supported return 0, else return an error code.

 * supported return 1, else return 0.

 **/

static int pci_msi_check_device(struct pci_dev *dev, int nvec)

static int pci_msi_supported(struct pci_dev *dev, int nvec)

{

	struct pci_bus *bus;



	/* MSI must be globally enabled and supported by the device */

	if (!pci_msi_enable)

		return -EINVAL;

		return 0;



	if (!dev || dev->no_msi || dev->current_state != PCI_D0)

		return -EINVAL;

		return 0;



	/*

	 * You can't ask to have 0 or less MSIs configured.
@@ -822,7 +821,7 @@ static int pci_msi_check_device(struct pci_dev *dev, int nvec) 
	 *  b) the list manipulation code assumes nvec >= 1.

	 */

	if (nvec < 1)

		return -ERANGE;

		return 0;



	/*

	 * Any bridge which does NOT route MSI transactions from its
@@ -833,9 +832,9 @@ static int pci_msi_check_device(struct pci_dev *dev, int nvec) 
	 */

	for (bus = dev->bus; bus; bus = bus->parent)

		if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)

			return -EINVAL;



			return 0;



	return 1;

}



/**
@@ -937,9 +936,8 @@ int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) 
	int status, nr_entries;

	int i, j;



	status = pci_msi_check_device(dev, nvec);

	if (status)

		return status;

	if (!pci_msi_supported(dev, nvec))

		return -EINVAL;



	if (!entries)

		return -EINVAL;
@@ -1050,9 +1048,8 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec) 
	int nvec;

	int rc;



	rc = pci_msi_check_device(dev, minvec);

	if (rc)

		return rc;

	if (!pci_msi_supported(dev, minvec))

		return -EINVAL;



	WARN_ON(!!dev->msi_enabled);

CRA Git | Maintained and supported by SUSTech CRA and CCSE