Author: hselasky
Date: Thu Mar 22 12:26:27 2018
New Revision: 331355
URL: https://svnweb.freebsd.org/changeset/base/331355
Log:
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.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/compat/linuxkpi/common/include/linux/pci.h
Modified: head/sys/compat/linuxkpi/common/include/linux/pci.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/pci.h Thu Mar 22 12:01:30
2018 (r331354)
+++ head/sys/compat/linuxkpi/common/include/linux/pci.h Thu Mar 22 12:26:27
2018 (r331355)
@@ -425,6 +425,15 @@ 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;
}
static inline bus_addr_t
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