#ifndef __USBMIDI_H #define __USBMIDI_H /* maximum number of endpoints per interface */ #define MIDI_MAX_ENDPOINTS 2 /* data for QUIRK_MIDI_FIXED_ENDPOINT */ struct snd_usb_midi_endpoint_info { int8_t out_ep; /* ep number, 0 autodetect */ uint8_t out_interval; /* interval for interrupt endpoints */ int8_t in_ep; uint8_t in_interval; uint16_t out_cables; /* bitmask */ uint16_t in_cables; /* bitmask */ }; /* for QUIRK_MIDI_YAMAHA, data is NULL */ /* for QUIRK_MIDI_MIDIMAN, data points to a snd_usb_midi_endpoint_info * structure (out_cables and in_cables only) */ /* for QUIRK_COMPOSITE, data points to an array of snd_usb_audio_quirk * structures, terminated with .ifnum = -1 */ /* for QUIRK_AUDIO_FIXED_ENDPOINT, data points to an audioformat structure */ /* for QUIRK_AUDIO/MIDI_STANDARD_INTERFACE, data is NULL */ /* for QUIRK_AUDIO_EDIROL_UA700_UA25/UA1000, data is NULL */ /* for QUIRK_IGNORE_INTERFACE, data is NULL */ /* for QUIRK_MIDI_NOVATION and _RAW, data is NULL */ /* for QUIRK_MIDI_EMAGIC, data points to a snd_usb_midi_endpoint_info * structure (out_cables and in_cables only) */ /* for QUIRK_MIDI_CME, data is NULL */ /* for QUIRK_MIDI_AKAI, data is NULL */ int __snd_usbmidi_create(struct snd_card *card, struct usb_interface *iface, struct list_head *midi_list, const struct snd_usb_audio_quirk *quirk, unsigned int usb_id); static inline int snd_usbmidi_create(struct snd_card *card, struct usb_interface *iface, struct list_head *midi_list, const struct snd_usb_audio_quirk *quirk) { return __snd_usbmidi_create(card, iface, midi_list, quirk, 0); } void snd_usbmidi_input_stop(struct list_head *p); void snd_usbmidi_input_start(struct list_head *p); void snd_usbmidi_disconnect(struct list_head *p); void snd_usbmidi_suspend(struct list_head *p); void snd_usbmidi_resume(struct list_head *p); #endif /* __USBMIDI_H */ git/commit/fs/befs/ChangeLog?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>commitdiff
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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 /fs/befs/ChangeLog
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+
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