diff options
| author | Stefan Agner <stefan@agner.ch> | 2017-04-14 18:35:08 -0700 |
|---|---|---|
| committer | Philippe Schenker <philippe.schenker@toradex.com> | 2019-05-09 11:13:51 +0200 |
| commit | f997a33eca8ce1a01e2e387bca436f4c1979d9e4 (patch) | |
| tree | 92466ab76ef312ec18ca521c429aca0ce857dc57 | |
| parent | 55febc010c03a506cba1c24d23efd1ea3fb24f22 (diff) | |
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 <k.opasiak@samsung.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
(cherry picked from commit 76180d716f91f035d9c8639497cf5459b44e1a51)
| -rw-r--r-- | drivers/usb/gadget/configfs.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index a5ca409dc97e..fa0ba1c2ee8f 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -788,9 +788,13 @@ 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, |