diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-11-11 16:54:15 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-11-17 17:15:18 +0300 |
| commit | fe97f59a78fefda6c4a8c8ee6a070b1f769fc801 (patch) | |
| tree | 2519e100a301b64631efc9cd063656d669ebea61 /drivers/pci/msi | |
| parent | fd19ce77993a49f3afc56bb4cae7eafb1ec69e0c (diff) | |
| download | linux-fe97f59a78fefda6c4a8c8ee6a070b1f769fc801.tar.xz | |
PCI/MSI: Check for MSI enabled in __pci_msix_enable()
PCI/MSI and PCI/MSI-X are mutually exclusive, but the MSI-X enable code
lacks a check for already enabled MSI.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20221111122013.653556720@linutronix.de
Diffstat (limited to 'drivers/pci/msi')
| -rw-r--r-- | drivers/pci/msi/msi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index fdd2ec09651e..160af9f01669 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -935,6 +935,11 @@ static int __pci_enable_msix_range(struct pci_dev *dev, if (maxvec < minvec) return -ERANGE; + if (dev->msi_enabled) { + pci_info(dev, "can't enable MSI-X (MSI already enabled)\n"); + return -EINVAL; + } + if (WARN_ON_ONCE(dev->msix_enabled)) return -EINVAL; |