usb: musb: musbhsdma: drop the controller check in dma_controller_destroy()

This check is hardly required and alas is wrong. 'c' might be NULL but
the chances are low that 'controller' after the container_of() becomes
NULL.

Since no other DMA implementation is doing that and musb-core does not
call it with a NULL pointer it can dropped.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index 3d1fd52..3f5e121 100644 (file)
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -371,9 +371,6 @@ void dma_controller_destroy(struct dma_controller *c)
        struct musb_dma_controller *controller = container_of(c,
                        struct musb_dma_controller, controller);
 
-       if (!controller)
-               return;
-
        if (controller->irq)
                free_irq(controller->irq, c);