[PATCH v2] usb: dwc3: fix memory leak of dwc->regset

[changbin . du]

From: "Du, Changbin" <changbin...@intel.com>

dwc->regset is allocated on dwc3_debugfs_init, and should
be released on init failure or dwc3_debugfs_exit. Btw,
The line "dwc->root = NULL" is unnecessary, so remove it.

Signed-off-by: Du, Changbin <changbin...@intel.com>
---
v2:
  Title changed;
  free dwc->regset on failure path.

---
 drivers/usb/dwc3/debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 9ac37fe..abd8889 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -678,7 +678,8 @@ int dwc3_debugfs_init(struct dwc3 *dwc)
 
 err1:
        debugfs_remove_recursive(root);
-
+       if (!dwc->regset)
+               kfree(dwc->regset);
 err0:
        return ret;
 }
@@ -686,5 +687,5 @@ err0:
 void dwc3_debugfs_exit(struct dwc3 *dwc)
 {
        debugfs_remove_recursive(dwc->root);
-       dwc->root = NULL;
+       kfree(dwc->regset);
 }
-- 
2.5.0