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 recip, int type,
10                          int target, void * data);
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ARGUMENTS

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

29       !in_interrupt ()
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DESCRIPTION

32       Returns device, interface, or endpoint status. Normally only of
33       interest to see if the device is self powered, or has enabled the
34       remote wakeup facility; or whether a bulk or interrupt endpoint is
35       halted (“stalled”).
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37       Bits in these status bitmaps are set using the SET_FEATURE request, and
38       cleared using the CLEAR_FEATURE request. The usb_clear_halt function
39       should be used to clear halt (“stall”) status.
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41       This call is synchronous, and may not be used in an interrupt context.
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43       Returns 0 and the status value in *data (in host byte order) on
44       success, or else the status code from the underlying usb_control_msg
45       call.
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48Kernel Hackers Manual 3.10         June 2019                 USB_GET_STATUS(9)
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