Staging: bcm: Fix semaphore locking bug in, IOCTL_BCM_BUFFER_DOWNLOAD

In this ioctl, we are testing to see if the lock is held.
If it is not held, that means this ioctl used incorrectly.
Therefore, we do not want to take the lock ourselves here.
Signed-off-by: NKevin McKinney <klmckinney1@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/bcm/Bcmchar.c

@@ -796,6 +796,7 @@ static long bcm_char_ioctl(struct file *filp, UINT cmd, ULONG arg)
 		if (!down_trylock(&Adapter->fw_download_sema)) {
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_PRINTK, 0, 0,
 					"Invalid way to download buffer. Use Start and then call this!!!\n");
+			up(&Adapter->fw_download_sema);
 			Status = -EINVAL;
 			break;
 		}