usb: gadget: f_mass_storage: use usb_gstrings_attach

Prepare for handling with configfs.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 6b6c7f1..32e5ab7 100644 (file)
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -242,6 +242,11 @@ static struct usb_gadget_strings   fsg_stringtab = {
        .strings        = fsg_strings,
 };
 
+static struct usb_gadget_strings *fsg_strings_array[] = {
+       &fsg_stringtab,
+       NULL,
+};
+
 /*-------------------------------------------------------------------------*/
 
 struct fsg_dev;
@@ -2645,6 +2650,7 @@ struct fsg_common *fsg_common_init(struct fsg_common *common,
        struct fsg_buffhd *bh;
        struct fsg_lun **curlun_it;
        struct fsg_lun_config *lcfg;
+       struct usb_string *us;
        int nluns, i, rc;
        char *pathbuf;
 
@@ -2687,14 +2693,13 @@ struct fsg_common *fsg_common_init(struct fsg_common *common,
        common->ep0req = cdev->req;
        common->cdev = cdev;
 
-       /* Maybe allocate device-global string IDs, and patch descriptors */
-       if (fsg_strings[FSG_STRING_INTERFACE].id == 0) {
-               rc = usb_string_id(cdev);
-               if (unlikely(rc < 0))
-                       goto error_release;
-               fsg_strings[FSG_STRING_INTERFACE].id = rc;
-               fsg_intf_desc.iInterface = rc;
+       us = usb_gstrings_attach(cdev, fsg_strings_array,
+                                ARRAY_SIZE(fsg_strings));
+       if (IS_ERR(us)) {
+               rc = PTR_ERR(us);
+               goto error_release;
        }
+       fsg_intf_desc.iInterface = us[FSG_STRING_INTERFACE].id;
 
        /*
         * Create the LUNs, open their backing files, and register the
@@ -2988,11 +2993,6 @@ autoconf_fail:
 
 /****************************** ADD FUNCTION ******************************/
 
-static struct usb_gadget_strings *fsg_strings_array[] = {
-       &fsg_stringtab,
-       NULL,
-};
-
 static int fsg_bind_config(struct usb_composite_dev *cdev,
                           struct usb_configuration *c,
                           struct fsg_common *common)
@@ -3005,7 +3005,6 @@ static int fsg_bind_config(struct usb_composite_dev *cdev,
                return -ENOMEM;
 
        fsg->function.name        = FSG_DRIVER_DESC;
-       fsg->function.strings     = fsg_strings_array;
        fsg->function.bind        = fsg_bind;
        fsg->function.unbind      = fsg_unbind;
        fsg->function.setup       = fsg_setup;