Date: Fri, 30 Mar 2018 18:53:12 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331801 - stable/11/sys/compat/linuxkpi/common/include/linux Message-ID: <201803301853.w2UIrCS3088789@repo.freebsd.org>
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Author: hselasky Date: Fri Mar 30 18:53:12 2018 New Revision: 331801 URL: https://svnweb.freebsd.org/changeset/base/331801 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/11/sys/compat/linuxkpi/common/include/linux/pci.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/compat/linuxkpi/common/include/linux/pci.h ============================================================================== --- stable/11/sys/compat/linuxkpi/common/include/linux/pci.h Fri Mar 30 18:52:24 2018 (r331800) +++ stable/11/sys/compat/linuxkpi/common/include/linux/pci.h Fri Mar 30 18:53:12 2018 (r331801) @@ -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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