From 76180d716f91f035d9c8639497cf5459b44e1a51 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Fri, 14 Apr 2017 18:35:08 -0700 Subject: [PATCH] usb: gadget: configfs: make qw_sign attribute symmetric Currently qw_sign requires UTF-8 character to set, but returns UTF-16 when read. This isn't obvious when simply using cat since the null characters are not visible, but hexdump unveils the true string: # echo MSFT100 > os_desc/qw_sign # hexdump -C os_desc/qw_sign 00000000 4d 00 53 00 46 00 54 00 31 00 30 00 30 00 |M.S.F.T.1.0.0.| Make qw_sign symmetric by returning an UTF-8 string too. Also follow common convention and add a new line at the end. Reviewed-by: Krzysztof Opasiak Signed-off-by: Stefan Agner Signed-off-by: Felipe Balbi --- drivers/usb/gadget/configfs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index cbff3b02840d..863ca4ded1be 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -787,9 +787,13 @@ static ssize_t os_desc_b_vendor_code_store(struct config_item *item, static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) { struct gadget_info *gi = os_desc_item_to_gadget_info(item); + int res; - memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); - return OS_STRING_QW_SIGN_LEN; + res = utf16s_to_utf8s((wchar_t *) gi->qw_sign, OS_STRING_QW_SIGN_LEN, + UTF16_LITTLE_ENDIAN, page, PAGE_SIZE - 1); + page[res++] = '\n'; + + return res; } static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page,