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[PATCH v2 09/26] usb: gadget: f_loopback: eliminate abuse of ep->driver data

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Since ep->driver_data is not used for endpoint claiming, neither for
enabled/disabled state storing, we can reduce number of places where
we read or modify it's value, as now it has no particular meaning for
function or framework logic.

In case of f_hid we only need to store in ep->driver_data pointer to
struct f_loopback, as it's used in loopback_complete() callback. All
other uses of ep->driver_data are now meaningless and can be safely
removed.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
---
 drivers/usb/gadget/function/f_loopback.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/function/f_loopback.c b/drivers/usb/gadget/function/f_loopback.c
index 6e2fe63..300e601 100644
--- a/drivers/usb/gadget/function/f_loopback.c
+++ b/drivers/usb/gadget/function/f_loopback.c
@@ -195,12 +195,10 @@ autoconf_fail:
 			f->name, cdev->gadget->name);
 		return -ENODEV;
 	}
-	loop->in_ep->driver_data = cdev;	/* claim */
 
 	loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_sink_desc);
 	if (!loop->out_ep)
 		goto autoconf_fail;
-	loop->out_ep->driver_data = cdev;	/* claim */
 
 	/* support high speed hardware */
 	hs_loop_source_desc.bEndpointAddress =
@@ -364,8 +362,7 @@ static int loopback_set_alt(struct usb_function *f,
 	struct usb_composite_dev *cdev = f->config->cdev;
 
 	/* we know alt is zero */
-	if (loop->in_ep->driver_data)
-		disable_loopback(loop);
+	disable_loopback(loop);
 	return enable_loopback(cdev, loop);
 }
 
-- 
1.9.1

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[PATCH v2 00/26] usb: gadget: encapsulate ep enable/disable Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 03/26] usb: gadget: epautoconf: add  usb_ep_autoconfig_release() function Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 11/26] usb: gadget: f_midi: eliminate abuse of ep->driver  data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 10/26] usb: gadget: f_mass_storage: eliminate abuse of  ep->driver data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 08/26] usb: gadget: f_hid: eliminate abuse of ep->driver data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 20/26] usb: gadget: f_uac1: eliminate abuse of ep->driver  data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 23/26] usb: gadget: u_ether: eliminate abuse of ep->driver  data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 12/26] usb: gadget: f_ncm: eliminate abuse of ep->driver data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 16/26] usb: gadget: f_rndis: eliminate abuse of ep->driver  data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 18/26] usb: gadget: f_sourcesink: eliminate abuse of  ep->driver data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 26/26] usb: gadget: legacy: tcm: eliminate abuse of  ep->driver data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:20 +0200
  [PATCH v2 09/26] usb: gadget: f_loopback: eliminate abuse of  ep->driver data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:30 +0200
  [PATCH v2 04/26] usb: gadget: introduce 'enabled' flag in struct usb_ep Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:30 +0200
  [PATCH v2 02/26] usb: gadget: f_ncm: obtain cdev from function instead  of driver_data Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:30 +0200
  [PATCH v2 01/26] usb: gadget: fix few outdated comments Robert Baldyga <r.baldyga@samsung.com> - 2015-09-16 12:30 +0200

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