[PATCH v2 09/17] dfu: Detach the controller on error

[Marek Vasut <marex@denx.de>]

In case anything errors out during the DFU registration, detach
the controller instead of bailing out right away. This way, the
controller can be reattached on next attempt.

Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: Angus Ainslie <angus@akkea.ca>
Cc: Dmitrii Merkurev <dimorinny@google.com>
Cc: Eddie Cai <eddie.cai.linux@gmail.com>
Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Lukasz Majewski <lukma@denx.de>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: Philipp Tomsich <philipp.tomsich@vrull.eu>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefan Roese <sr@denx.de>
Cc: kernel@puri.sm
---
V2: Add RB from Mattijs
---
 common/dfu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/dfu.c b/common/dfu.c
index 96190889ab7..32fba84da16 100644
--- a/common/dfu.c
+++ b/common/dfu.c
@@ -34,7 +34,8 @@ int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
 	ret = g_dnl_register(usb_dnl_gadget);
 	if (ret) {
 		pr_err("g_dnl_register failed");
-		return CMD_RET_FAILURE;
+		ret = CMD_RET_FAILURE;
+		goto err_detach;
 	}
 
 #ifdef CONFIG_DFU_TIMEOUT
@@ -106,6 +107,7 @@ int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
 	}
 exit:
 	g_dnl_unregister();
+err_detach:
 	usb_gadget_release(usbctrl_index);
 
 	if (dfu_reset)
-- 
2.40.1