staging: gdm72xx: return -EINVAL instead of BUG_ON for invalid data length

This patch changes gdm_usb_send() and gdm_sdio_send() to return -EINVAL instead
of calling BUG_ON if an invalid data length is passed to the functions.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Reported-by: NMichalis Pappas <mpappas@fastmail.fm>
Signed-off-by: NBen Chan <benchan@chromium.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm72xx/gdm_sdio.c

@@ -390,7 +390,8 @@ static int gdm_sdio_send(void *priv_dev, void *data, int len,
 	u16 cmd_evt;
 	unsigned long flags;
 
-	BUG_ON(len > TX_BUF_SIZE - TYPE_A_HEADER_SIZE);
+	if (len > TX_BUF_SIZE - TYPE_A_HEADER_SIZE)
+		return -EINVAL;
 
 	spin_lock_irqsave(&tx->lock, flags);
 

drivers/staging/gdm72xx/gdm_usb.c

@@ -312,7 +312,8 @@ static int gdm_usb_send(void *priv_dev, void *data, int len,
 		return -ENODEV;
 	}
 
-	BUG_ON(len > TX_BUF_SIZE - padding - 1);
+	if (len > TX_BUF_SIZE - padding - 1)
+		return -EINVAL;
 
 	spin_lock_irqsave(&tx->lock, flags);