[PATCH -next v2] usb: gadget: lpc32xx_udc: Convert to DEFINE_SHOW_ATTRIBUTE

[Qinglang Miao]

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Qinglang Miao <miaoqingl...@huawei.com>
---
v2: based on linux-next(20200917), and can be applied to
    mainline cleanly now.

 drivers/usb/gadget/udc/lpc32xx_udc.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c 
b/drivers/usb/gadget/udc/lpc32xx_udc.c
index e8a4637a9..3f1c62adc 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -495,7 +495,7 @@ static void proc_ep_show(struct seq_file *s, struct 
lpc32xx_ep *ep)
        }
 }
 
-static int proc_udc_show(struct seq_file *s, void *unused)
+static int udc_show(struct seq_file *s, void *unused)
 {
        struct lpc32xx_udc *udc = s->private;
        struct lpc32xx_ep *ep;
@@ -524,22 +524,11 @@ static int proc_udc_show(struct seq_file *s, void *unused)
        return 0;
 }
 
-static int proc_udc_open(struct inode *inode, struct file *file)
-{
-       return single_open(file, proc_udc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations proc_ops = {
-       .owner          = THIS_MODULE,
-       .open           = proc_udc_open,
-       .read           = seq_read,
-       .llseek         = seq_lseek,
-       .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(udc);
 
 static void create_debug_file(struct lpc32xx_udc *udc)
 {
-       udc->pde = debugfs_create_file(debug_filename, 0, NULL, udc, &proc_ops);
+       udc->pde = debugfs_create_file(debug_filename, 0, NULL, udc, &udc_fops);
 }
 
 static void remove_debug_file(struct lpc32xx_udc *udc)
-- 
2.23.0