1USB_GET_STATUS(9)                USB Core APIs               USB_GET_STATUS(9)
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NAME

6       usb_get_status - issues a GET_STATUS call
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SYNOPSIS

9       int usb_get_status(struct usb_device * dev, int type, int target,
10                          void * data);
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ARGUMENTS

13       dev
14           the device whose status is being checked
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16       type
17           USB_RECIP_*; for device, interface, or endpoint
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19       target
20           zero (for device), else interface or endpoint number
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22       data
23           pointer to two bytes of bitmap data
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CONTEXT

26       !in_interrupt ()
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DESCRIPTION

29       Returns device, interface, or endpoint status. Normally only of
30       interest to see if the device is self powered, or has enabled the
31       remote wakeup facility; or whether a bulk or interrupt endpoint is
32       halted (“stalled”).
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34       Bits in these status bitmaps are set using the SET_FEATURE request, and
35       cleared using the CLEAR_FEATURE request. The usb_clear_halt function
36       should be used to clear halt (“stall”) status.
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38       This call is synchronous, and may not be used in an interrupt context.
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40       Returns the number of bytes received on success, or else the status
41       code returned by the underlying usb_control_msg call.
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44Kernel Hackers Manual 2.6.       November 2011               USB_GET_STATUS(9)
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