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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Alexey Kardashevskiy
0e8bb91c6d
commit98fd72fe82upstream. When IODA2 creates a PE, it creates an IOMMU table with it_ops::free set to pnv_ioda2_table_free() which calls pnv_pci_ioda2_table_free_pages(). Since iommu_tce_table_put() calls it_ops::free when the last reference to the table is released, explicit call to pnv_pci_ioda2_table_free_pages() is not needed so let's remove it. This should fix double free in the case of PCI hotuplug as pnv_pci_ioda2_table_free_pages() does not reset neither iommu_table::it_base nor ::it_size. This was not exposed by SRIOV as it uses different code path via pnv_pcibios_sriov_disable(). IODA1 does not inialize it_ops::free so it does not have this issue. Fixes:c5f7700bbd("powerpc/powernv: Dynamically release PE") Cc: stable@vger.kernel.org # v4.8+ Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.