From 27e20603c54ba633ed259284d006275f13c9f95b Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Tue, 23 Sep 2014 14:25:11 -0600 Subject: PCI/MSI: Move D0 check into pci_msi_check_device() Both callers of pci_msi_check_device() check that the device is in D0 state, so move the check from the callers into pci_msi_check_device() itself. In pci_enable_msi_range(), note that pci_msi_check_device() never returns a positive value any more, so the loop that called it until it returns zero or negative is no longer necessary. [bhelgaas: changelog, split to separate patch] Signed-off-by: Alexander Gordeev Signed-off-by: Bjorn Helgaas --- drivers/pci/msi.c | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-) (limited to 'drivers/pci/msi.c') diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index db21b77a03a5..338b027ea65f 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -810,7 +810,10 @@ static int pci_msi_check_device(struct pci_dev *dev, int nvec) struct pci_bus *bus; /* MSI must be globally enabled and supported by the device */ - if (!pci_msi_enable || !dev || dev->no_msi) + if (!pci_msi_enable) + return -EINVAL; + + if (!dev || dev->no_msi || dev->current_state != PCI_D0) return -EINVAL; /* @@ -934,13 +937,13 @@ int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) int status, nr_entries; int i, j; - if (!entries || !dev->msix_cap || dev->current_state != PCI_D0) - return -EINVAL; - status = pci_msi_check_device(dev, nvec); if (status) return status; + if (!entries) + return -EINVAL; + nr_entries = pci_msix_vec_count(dev); if (nr_entries < 0) return nr_entries; @@ -1047,8 +1050,9 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec) int nvec; int rc; - if (dev->current_state != PCI_D0) - return -EINVAL; + rc = pci_msi_check_device(dev, minvec); + if (rc) + return rc; WARN_ON(!!dev->msi_enabled); @@ -1070,17 +1074,6 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec) else if (nvec > maxvec) nvec = maxvec; - do { - rc = pci_msi_check_device(dev, nvec); - if (rc < 0) { - return rc; - } else if (rc > 0) { - if (rc < minvec) - return -ENOSPC; - nvec = rc; - } - } while (rc); - do { rc = msi_capability_init(dev, nvec); if (rc < 0) { -- cgit v1.2.3-58-ga151