Author: hselasky
Date: Tue Apr 24 10:05:23 2018
New Revision: 332922
URL: https://svnweb.freebsd.org/changeset/base/332922
Log:
MFC r331355:
Clear old MSIX IRQ numbers in the LinuxKPI.
When disabling the MSIX IRQ vectors for a PCI device through the
LinuxKPI, make sure any old MSIX IRQ numbers are no longer visible to
the linux_pci_find_irq_dev() function else IRQs can be requested from
the wrong PCI device.
Sponsored by: Mellanox Technologies
Modified:
stable/10/sys/ofed/include/linux/pci.h
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/ofed/include/linux/pci.h
==============================================================================
--- stable/10/sys/ofed/include/linux/pci.h Tue Apr 24 10:03:16 2018
(r332921)
+++ stable/10/sys/ofed/include/linux/pci.h Tue Apr 24 10:05:23 2018
(r332922)
@@ -349,6 +349,15 @@ pci_disable_msix(struct pci_dev *pdev)
{
pci_release_msi(pdev->dev.bsddev);
+
+ /*
+ * The MSIX IRQ numbers associated with this PCI device are no
+ * longer valid and might be re-assigned. Make sure
+ * linux_pci_find_irq_dev() does no longer see them by
+ * resetting their references to zero:
+ */
+ pdev->dev.msix = 0;
+ pdev->dev.msix_max = 0;
}
#define PCI_CAP_ID_EXP PCIY_EXPRESS
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