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usb: gadget: add "usb_validate_langid" function

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The USB LANGID validation code in "check_user_usb_string" function is
moved to "usb_validate_langid" function which can be used by other usb
gadget drivers.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Tao Ren
2020-03-15 12:16:28 -07:00
committed by Felipe Balbi
parent 5cc0710f23
commit 17309a6a43
3 changed files with 28 additions and 13 deletions
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3
include/linux/usb/gadget.h
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@@ -773,6 +773,9 @@ struct usb_gadget_string_container {
/* put descriptor for string with that id into buf (buflen >= 256) */
int usb_gadget_get_string(const struct usb_gadget_strings *table, int id, u8 *buf);
/* check if the given language identifier is valid */
bool usb_validate_langid(u16 langid);
/*-------------------------------------------------------------------------*/
/* utility to simplify managing config descriptors */