tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
usb: common: introduce usb_state_string()
this function will receive enum usb_device_state
and return a human-readable string from it or,
case an unknown value is passed as argument,
the string "UNKNOWN".
Signed-off-by: Felipe Balbi <balbi@ti.com>
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+21
drivers/usb/usb-common.c
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drivers/usb/usb-common.c
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}
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EXPORT_SYMBOL_GPL(usb_speed_string);
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const char *usb_state_string(enum usb_device_state state)
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{
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static const char *const names[] = {
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[USB_STATE_NOTATTACHED] = "not attached",
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[USB_STATE_ATTACHED] = "attached",
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[USB_STATE_POWERED] = "powered",
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[USB_STATE_RECONNECTING] = "reconnecting",
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[USB_STATE_UNAUTHENTICATED] = "unauthenticated",
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[USB_STATE_DEFAULT] = "default",
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[USB_STATE_ADDRESS] = "addresssed",
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[USB_STATE_CONFIGURED] = "configured",
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[USB_STATE_SUSPENDED] = "suspended",
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};
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if (state < 0 || state >= ARRAY_SIZE(names))
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return "UNKNOWN";
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return names[state];
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}
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EXPORT_SYMBOL_GPL(usb_state_string);
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MODULE_LICENSE("GPL");
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include/linux/usb/ch9.h
+9
include/linux/usb/ch9.h
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*/
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extern const char *usb_speed_string(enum usb_device_speed speed);
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/**
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* usb_state_string - Returns human readable name for the state.
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* @state: The state to return a human-readable name for. If it's not
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* any of the states devices in usb_device_state_string enum,
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* the string UNKNOWN will be returned.
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*/
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extern const char *usb_state_string(enum usb_device_state state);
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#endif /* __LINUX_USB_CH9_H */