usb: gadget: g_ffs: remove a reduntant gfs_ether_setup variable

Since d6a0143985489e470a118605352f4b18df0ce142
usb: gadget: move the global the_dev variable to their users
"the_dev" variable can be used as a "setup done" flag; non-NULL
meaning "setup done", NULL meaning "setup not done". Moreover,
gether_cleanup() can be safely called with a NULL argument.

Corrected a comment to be consistent with the code.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
index 2344efe4f4ce8611e6869605e89e1c18aef7000a..e9540824e713c89d600576756c664e057bafe450 100644 (file)
--- a/drivers/usb/gadget/g_ffs.c
+++ b/drivers/usb/gadget/g_ffs.c
@@ -182,7 +182,6 @@ static __refdata struct usb_composite_driver gfs_driver = {
 
 static DEFINE_MUTEX(gfs_lock);
 static unsigned int missing_funcs;
-static bool gfs_ether_setup;
 static bool gfs_registered;
 static bool gfs_single_func;
 static struct gfs_ffs_obj *ffs_tab;
@@ -364,7 +363,6 @@ static int gfs_bind(struct usb_composite_dev *cdev)
                ret = PTR_ERR(the_dev);
                goto error_quick;
        }
-       gfs_ether_setup = true;
 
        ret = usb_string_ids_tab(cdev, gfs_strings);
        if (unlikely(ret < 0))
@@ -401,8 +399,8 @@ error_unbind:
                functionfs_unbind(ffs_tab[i].ffs_data);
 error:
        gether_cleanup(the_dev);
+       the_dev = NULL;
 error_quick:
-       gfs_ether_setup = false;
        return ret;
 }
 
@@ -415,18 +413,17 @@ static int gfs_unbind(struct usb_composite_dev *cdev)
 
        ENTER();
 
+       gether_cleanup(the_dev);
+       the_dev = NULL;
+
        /*
         * We may have been called in an error recovery from
         * composite_bind() after gfs_unbind() failure so we need to
-        * check if gfs_ffs_data is not NULL since gfs_bind() handles
+        * check if instance's ffs_data is not NULL since gfs_bind() handles
         * all error recovery itself.  I'd rather we werent called
         * from composite on orror recovery, but what you're gonna
         * do...?
         */
-       if (gfs_ether_setup)
-               gether_cleanup(the_dev);
-       gfs_ether_setup = false;
-
        for (i = func_num; i--; )
                if (ffs_tab[i].ffs_data)
                        functionfs_unbind(ffs_tab[i].ffs_data);