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authorStefan Agner <stefan@agner.ch>2017-04-14 18:35:08 -0700
committerFelipe Balbi <felipe.balbi@linux.intel.com>2017-06-13 13:21:00 +0300
commit76180d716f91f035d9c8639497cf5459b44e1a51 (patch)
tree3810013e20cd6885b2c53d29b2ad6c8d672d421d /drivers/usb/gadget/configfs.c
parenta9548c55295a4268f9187e1ec93264a0682fa745 (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>
Diffstat (limited to 'drivers/usb/gadget/configfs.c')
-rw-r--r--drivers/usb/gadget/configfs.c8
1 files 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,