#undef TRACE_SYSTEM #define TRACE_SYSTEM hda #if !defined(__HDAC_TRACE_H) || defined(TRACE_HEADER_MULTI_READ) #define __HDAC_TRACE_H #include #include #include #ifndef HDAC_MSG_MAX #define HDAC_MSG_MAX 500 #endif struct hdac_bus; struct hdac_codec; TRACE_EVENT(hda_send_cmd, TP_PROTO(struct hdac_bus *bus, unsigned int cmd), TP_ARGS(bus, cmd), TP_STRUCT__entry(__dynamic_array(char, msg, HDAC_MSG_MAX)), TP_fast_assign( snprintf(__get_str(msg), HDAC_MSG_MAX, "[%s:%d] val=0x%08x", dev_name((bus)->dev), (cmd) >> 28, cmd); ), TP_printk("%s", __get_str(msg)) ); TRACE_EVENT(hda_get_response, TP_PROTO(struct hdac_bus *bus, unsigned int addr, unsigned int res), TP_ARGS(bus, addr, res), TP_STRUCT__entry(__dynamic_array(char, msg, HDAC_MSG_MAX)), TP_fast_assign( snprintf(__get_str(msg), HDAC_MSG_MAX, "[%s:%d] val=0x%08x", dev_name((bus)->dev), addr, res); ), TP_printk("%s", __get_str(msg)) ); TRACE_EVENT(hda_unsol_event, TP_PROTO(struct hdac_bus *bus, u32 res, u32 res_ex), TP_ARGS(bus, res, res_ex), TP_STRUCT__entry(__dynamic_array(char, msg, HDAC_MSG_MAX)), TP_fast_assign( snprintf(__get_str(msg), HDAC_MSG_MAX, "[%s:%d] res=0x%08x, res_ex=0x%08x", dev_name((bus)->dev), res_ex & 0x0f, res, res_ex); ), TP_printk("%s", __get_str(msg)) ); DECLARE_EVENT_CLASS(hdac_stream, TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev), TP_ARGS(bus, azx_dev), TP_STRUCT__entry( __field(unsigned char, stream_tag) ), TP_fast_assign( __entry->stream_tag = (azx_dev)->stream_tag; ), TP_printk("stream_tag: %d", __entry->stream_tag) ); DEFINE_EVENT(hdac_stream, snd_hdac_stream_start, TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev), TP_ARGS(bus, azx_dev) ); DEFINE_EVENT(hdac_stream, snd_hdac_stream_stop, TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev), TP_ARGS(bus, azx_dev) ); #endif /* __HDAC_TRACE_H */ /* This part must be outside protection */ #undef TRACE_INCLUDE_PATH #define TRACE_INCLUDE_PATH . #undef TRACE_INCLUDE_FILE #define TRACE_INCLUDE_FILE trace #include 69fc6963c16003f50d7e8d74b02d0a143'>commitdiff
path: root/drivers/usb/serial/f81232.c
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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 /drivers/usb/serial/f81232.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 'drivers/usb/serial/f81232.c')