#undef TRACE_SYSTEM #define TRACE_SYSTEM cma #if !defined(_TRACE_CMA_H) || defined(TRACE_HEADER_MULTI_READ) #define _TRACE_CMA_H #include #include TRACE_EVENT(cma_alloc, TP_PROTO(unsigned long pfn, const struct page *page, unsigned int count, unsigned int align), TP_ARGS(pfn, page, count, align), TP_STRUCT__entry( __field(unsigned long, pfn) __field(const struct page *, page) __field(unsigned int, count) __field(unsigned int, align) ), TP_fast_assign( __entry->pfn = pfn; __entry->page = page; __entry->count = count; __entry->align = align; ), TP_printk("pfn=%lx page=%p count=%u align=%u", __entry->pfn, __entry->page, __entry->count, __entry->align) ); TRACE_EVENT(cma_release, TP_PROTO(unsigned long pfn, const struct page *page, unsigned int count), TP_ARGS(pfn, page, count), TP_STRUCT__entry( __field(unsigned long, pfn) __field(const struct page *, page) __field(unsigned int, count) ), TP_fast_assign( __entry->pfn = pfn; __entry->page = page; __entry->count = count; ), TP_printk("pfn=%lx page=%p count=%u", __entry->pfn, __entry->page, __entry->count) ); #endif /* _TRACE_CMA_H */ /* This part must be outside protection */ #include back net-next plumbingsTobias Klauser
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /sound/soc/codecs/max98926.c
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'sound/soc/codecs/max98926.c')