These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / usb / gadget / function / f_printer.c

diff --git a/kernel/drivers/usb/gadget/function/f_printer.c b/kernel/drivers/usb/gadget/function/f_printer.c
index 44173df..0fbfb2b 100644 (file)
--- a/kernel/drivers/usb/gadget/function/f_printer.c
+++ b/kernel/drivers/usb/gadget/function/f_printer.c
@@ -804,6 +804,8 @@ done:
 
 static void printer_reset_interface(struct printer_dev *dev)
 {
+       unsigned long   flags;
+
        if (dev->interface < 0)
                return;
 
@@ -815,9 +817,11 @@ static void printer_reset_interface(struct printer_dev *dev)
        if (dev->out_ep->desc)
                usb_ep_disable(dev->out_ep);
 
+       spin_lock_irqsave(&dev->lock, flags);
        dev->in_ep->desc = NULL;
        dev->out_ep->desc = NULL;
        dev->interface = -1;
+       spin_unlock_irqrestore(&dev->lock, flags);
 }
 
 /* Change our operational Interface. */
@@ -1035,12 +1039,10 @@ autoconf_fail:
                        cdev->gadget->name);
                return -ENODEV;
        }
-       in_ep->driver_data = in_ep;     /* claim */
 
        out_ep = usb_ep_autoconfig(cdev->gadget, &fs_ep_out_desc);
        if (!out_ep)
                goto autoconf_fail;
-       out_ep->driver_data = out_ep;   /* claim */
 
        /* assumes that all endpoints are dual-speed */
        hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress;
@@ -1131,13 +1133,10 @@ static int printer_func_set_alt(struct usb_function *f,
 static void printer_func_disable(struct usb_function *f)
 {
        struct printer_dev *dev = func_to_printer(f);
-       unsigned long           flags;
 
        DBG(dev, "%s\n", __func__);
 
-       spin_lock_irqsave(&dev->lock, flags);
        printer_reset_interface(dev);
-       spin_unlock_irqrestore(&dev->lock, flags);
 }
 
 static inline struct f_printer_opts
@@ -1147,9 +1146,6 @@ static inline struct f_printer_opts
                            func_inst.group);
 }
 
-CONFIGFS_ATTR_STRUCT(f_printer_opts);
-CONFIGFS_ATTR_OPS(f_printer_opts);
-
 static void printer_attr_release(struct config_item *item)
 {
        struct f_printer_opts *opts = to_f_printer_opts(item);
@@ -1159,13 +1155,12 @@ static void printer_attr_release(struct config_item *item)
 
 static struct configfs_item_operations printer_item_ops = {
        .release        = printer_attr_release,
-       .show_attribute = f_printer_opts_attr_show,
-       .store_attribute = f_printer_opts_attr_store,
 };
 
-static ssize_t f_printer_opts_pnp_string_show(struct f_printer_opts *opts,
+static ssize_t f_printer_opts_pnp_string_show(struct config_item *item,
                                              char *page)
 {
+       struct f_printer_opts *opts = to_f_printer_opts(item);
        int result;
 
        mutex_lock(&opts->lock);
@@ -1175,9 +1170,10 @@ static ssize_t f_printer_opts_pnp_string_show(struct f_printer_opts *opts,
        return result;
 }
 
-static ssize_t f_printer_opts_pnp_string_store(struct f_printer_opts *opts,
+static ssize_t f_printer_opts_pnp_string_store(struct config_item *item,
                                               const char *page, size_t len)
 {
+       struct f_printer_opts *opts = to_f_printer_opts(item);
        int result, l;
 
        mutex_lock(&opts->lock);
@@ -1190,14 +1186,12 @@ static ssize_t f_printer_opts_pnp_string_store(struct f_printer_opts *opts,
        return result;
 }
 
-static struct f_printer_opts_attribute f_printer_opts_pnp_string =
-       __CONFIGFS_ATTR(pnp_string, S_IRUGO | S_IWUSR,
-                       f_printer_opts_pnp_string_show,
-                       f_printer_opts_pnp_string_store);
+CONFIGFS_ATTR(f_printer_opts_, pnp_string);
 
-static ssize_t f_printer_opts_q_len_show(struct f_printer_opts *opts,
+static ssize_t f_printer_opts_q_len_show(struct config_item *item,
                                         char *page)
 {
+       struct f_printer_opts *opts = to_f_printer_opts(item);
        int result;
 
        mutex_lock(&opts->lock);
@@ -1207,9 +1201,10 @@ static ssize_t f_printer_opts_q_len_show(struct f_printer_opts *opts,
        return result;
 }
 
-static ssize_t f_printer_opts_q_len_store(struct f_printer_opts *opts,
+static ssize_t f_printer_opts_q_len_store(struct config_item *item,
                                          const char *page, size_t len)
 {
+       struct f_printer_opts *opts = to_f_printer_opts(item);
        int ret;
        u16 num;
 
@@ -1230,13 +1225,11 @@ end:
        return ret;
 }
 
-static struct f_printer_opts_attribute f_printer_opts_q_len =
-       __CONFIGFS_ATTR(q_len, S_IRUGO | S_IWUSR, f_printer_opts_q_len_show,
-                       f_printer_opts_q_len_store);
+CONFIGFS_ATTR(f_printer_opts_, q_len);
 
 static struct configfs_attribute *printer_attrs[] = {
-       &f_printer_opts_pnp_string.attr,
-       &f_printer_opts_q_len.attr,
+       &f_printer_opts_attr_pnp_string,
+       &f_printer_opts_attr_q_len,
        NULL,
 };
 
@@ -1248,7 +1241,15 @@ static struct config_item_type printer_func_type = {
 
 static inline int gprinter_get_minor(void)
 {
-       return ida_simple_get(&printer_ida, 0, 0, GFP_KERNEL);
+       int ret;
+
+       ret = ida_simple_get(&printer_ida, 0, 0, GFP_KERNEL);
+       if (ret >= PRINTER_MINORS) {
+               ida_simple_remove(&printer_ida, ret);
+               ret = -ENODEV;
+       }
+
+       return ret;
 }
 
 static inline void gprinter_put_minor(int minor)