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usb: handle NULL table in usb_gadget_get_string

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Allow a NULL table to be passed to usb_gadget_get_string for cases
when a string table may not be populated.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Tom Rini <trini@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
This commit is contained in:
Rob Herring 2014-04-18 08:54:28 -05:00 committed by Marek Vasut
parent fd2a89b20b
commit 52d45012ff
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/gadget/usbstring.c
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@ -108,6 +108,9 @@ usb_gadget_get_string(struct usb_gadget_strings *table, int id, u8 *buf)
struct usb_string *s;
int len;
if (!table)
return -EINVAL;
/* descriptor 0 has the language id */
if (id == 0) {
buf[0] = 4;