[PATCH 12/15] usb/gadget: acm_ms: use function framework for ACM

[Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>]

This patch converts the acm_ms gadget to make use of the function
framework to request the ACM function.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
 drivers/usb/gadget/Kconfig  |    1 +
 drivers/usb/gadget/acm_ms.c |   21 ++++++++++++++-------
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index b61c72f..8dad2ce 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -844,6 +844,7 @@ config USB_G_ACM_MS
 	depends on BLOCK
 	select USB_LIBCOMPOSITE
 	select USB_U_SERIAL
+	select USB_F_ACM
 	help
 	  This driver provides two functions in one configuration:
 	  a mass storage, and a CDC ACM (serial port) link.
diff --git a/drivers/usb/gadget/acm_ms.c b/drivers/usb/gadget/acm_ms.c
index 4c5f116..c570aa2 100644
--- a/drivers/usb/gadget/acm_ms.c
+++ b/drivers/usb/gadget/acm_ms.c
@@ -40,8 +40,6 @@
  * the runtime footprint, and giving us at least some parts of what
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
-#define USB_FACM_INCLUDED
-#include "f_acm.c"
 #include "f_mass_storage.c"
 
 /*-------------------------------------------------------------------------*/
@@ -111,7 +109,7 @@ FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
 static struct fsg_common fsg_common;
 
 /*-------------------------------------------------------------------------*/
-
+static struct usb_function *f_acm;
 /*
  * We _always_ have both ACM and mass storage functions.
  */
@@ -124,16 +122,25 @@ static int __init acm_ms_do_config(struct usb_configuration *c)
 		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
 	}
 
+	f_acm = usb_get_function("acm");
+	if (IS_ERR(f_acm))
+		return PTR_ERR(f_acm);
 
-	status = acm_bind_config(c, 0);
+	facm_configure(f_acm, 0);
+	status = usb_add_function(c, f_acm);
 	if (status < 0)
-		return status;
+		goto err_conf;
 
 	status = fsg_bind_config(c->cdev, c, &fsg_common);
 	if (status < 0)
-		return status;
+		goto err_fsg;
 
 	return 0;
+err_fsg:
+	usb_remove_function(c, f_acm);
+err_conf:
+	usb_put_function(f_acm);
+	return status;
 }
 
 static struct usb_configuration acm_ms_config_driver = {
@@ -194,8 +201,8 @@ static int __init acm_ms_bind(struct usb_composite_dev *cdev)
 
 static int __exit acm_ms_unbind(struct usb_composite_dev *cdev)
 {
+	usb_put_function(f_acm);
 	gserial_cleanup();
-
 	return 0;
 }
 
-- 
1.7.10.4

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