SND_DMA_RESERVE_BUF(9) Sound Devices SND_DMA_RESERVE_BUF(9)NAME
snd_dma_reserve_buf - reserve the buffer
SYNOPSIS
int snd_dma_reserve_buf(struct snd_dma_buffer * dmab, unsigned int id);
ARGUMENTS
dmab
the buffer to reserve
id
the buffer id
DESCRIPTION
Reserves the given buffer as a reserved buffer.
Returns zero if successful, or a negative code at error.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 SND_DMA_RESERVE_BUF(9)
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USB_GADGET_CONFIG_BU(9) Kernel Mode Gadget API USB_GADGET_CONFIG_BU(9)NAME
usb_gadget_config_buf - builts a complete configuration descriptor
SYNOPSIS
int usb_gadget_config_buf(const struct usb_config_descriptor * config, void * buf, unsigned length,
const struct usb_descriptor_header ** desc);
ARGUMENTS
config
Header for the descriptor, including characteristics such as power requirements and number of interfaces.
buf
Buffer for the resulting configuration descriptor.
length
Length of buffer. If this is not big enough to hold the entire configuration descriptor, an error code will be returned.
desc
Null-terminated vector of pointers to the descriptors (interface, endpoint, etc) defining all functions in this device configuration.
DESCRIPTION
This copies descriptors into the response buffer, building a descriptor for that configuration. It returns the buffer length or a negative
status code. The config.wTotalLength field is set to match the length of the result, but other descriptor fields (including power usage and
interface count) must be set by the caller.
Gadget drivers could use this when constructing a config descriptor in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_GADGET_CONFIG_BU(9)
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