[patch] staging: gdm72xx: unlock on error in init_usb()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

We recently added locking here and there was an error path which is
missing an unlock.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/staging/gdm72xx/gdm_usb.c b/drivers/staging/gdm72xx/gdm_usb.c
index e434764..e0cb2ff 100644
--- a/drivers/staging/gdm72xx/gdm_usb.c
+++ b/drivers/staging/gdm72xx/gdm_usb.c
@@ -205,6 +205,7 @@ static int init_usb(struct usbwm_dev *udev)
 	for (i = 0; i < MAX_NR_SDU_BUF; i++) {
 		t = alloc_tx_struct(tx);
 		if (t == NULL) {
+			spin_unlock_irqrestore(&tx->lock, flags);
 			ret = -ENOMEM;
 			goto fail;
 		}
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