Re: [PATCH v5 2/5] usb: gadget: configfs: pass UDC name via usb_gadget_driver struct

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Hello,

On 06/23/2015 12:01 AM, Ruslan Bilovol wrote:
Now when udc-core supports binding to specific UDC by passing
its name via 'udc_name' member of usb_gadget_driver struct,
switch to this generic approach.

Tested-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx>
---
  drivers/usb/gadget/configfs.c | 27 ++++++++++++++-------------
  1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index c42765b..efad021 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -54,7 +54,6 @@ struct gadget_info {
  	struct list_head string_list;
  	struct list_head available_func;

-	const char *udc_name;
  #ifdef CONFIG_USB_OTG
  	struct usb_otg_descriptor otg;
  #endif
@@ -230,21 +229,21 @@ static ssize_t gadget_dev_desc_bcdUSB_store(struct gadget_info *gi,

  static ssize_t gadget_dev_desc_UDC_show(struct gadget_info *gi, char *page)
  {
-	return sprintf(page, "%s\n", gi->udc_name ?: "");
+	return sprintf(page, "%s\n", gi->composite.gadget_driver.udc_name ?: "");
  }

  static int unregister_gadget(struct gadget_info *gi)
  {
  	int ret;

-	if (!gi->udc_name)
+	if (!gi->composite.gadget_driver.udc_name)
  		return -ENODEV;

  	ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver);
  	if (ret)
  		return ret;
-	kfree(gi->udc_name);
-	gi->udc_name = NULL;
+	kfree(gi->composite.gadget_driver.udc_name);
+	gi->composite.gadget_driver.udc_name = NULL;
  	return 0;
  }

@@ -267,14 +266,16 @@ static ssize_t gadget_dev_desc_UDC_store(struct gadget_info *gi,
  		if (ret)
  			goto err;
  	} else {
-		if (gi->udc_name) {
+		if (gi->composite.gadget_driver.udc_name) {

You are using this very long if condition in a few places, maybe it would be more suitable to define a macro or inline function for this? Something like gadget_dev_bound() or gadget_dev_is_active() or some other more suitable name.

Best regards,
--
Krzysztof Opasiak
Samsung R&D Institute Poland
Samsung Electronics
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