[media] v4l: omap4iss: Make omap4iss_isp_subclk_(en|dis)able() functions void

The functions always succeed, there's no need to return an error value.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/omap4iss/iss.c

@@ -836,7 +836,7 @@ int omap4iss_subclk_disable(struct iss_device *iss,
 				 ISP5_CTRL_IPIPE_CLK_ENABLE |\
 				 ISP5_CTRL_IPIPEIF_CLK_ENABLE)
 
-static int __iss_isp_subclk_update(struct iss_device *iss)
+static void __iss_isp_subclk_update(struct iss_device *iss)
 {
 	u32 clk = 0;
 
@@ -861,24 +861,22 @@ static int __iss_isp_subclk_update(struct iss_device *iss)
 	writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_SYS1] + ISP5_CTRL) &
 		~ISS_ISP5_CLKCTRL_MASK) | clk,
 		iss->regs[OMAP4_ISS_MEM_ISP_SYS1] + ISP5_CTRL);
-
-	return 0;
 }
 
-int omap4iss_isp_subclk_enable(struct iss_device *iss,
+void omap4iss_isp_subclk_enable(struct iss_device *iss,
 				enum iss_isp_subclk_resource res)
 {
 	iss->isp_subclk_resources |= res;
 
-	return __iss_isp_subclk_update(iss);
+	__iss_isp_subclk_update(iss);
 }
 
-int omap4iss_isp_subclk_disable(struct iss_device *iss,
-				enum iss_isp_subclk_resource res)
+void omap4iss_isp_subclk_disable(struct iss_device *iss,
+				 enum iss_isp_subclk_resource res)
 {
 	iss->isp_subclk_resources &= ~res;
 
-	return __iss_isp_subclk_update(iss);
+	__iss_isp_subclk_update(iss);
 }
 
 /*

drivers/staging/media/omap4iss/iss.h

@@ -136,10 +136,10 @@ int omap4iss_subclk_enable(struct iss_device *iss,
 			   enum iss_subclk_resource res);
 int omap4iss_subclk_disable(struct iss_device *iss,
 			    enum iss_subclk_resource res);
-int omap4iss_isp_subclk_enable(struct iss_device *iss,
-				enum iss_isp_subclk_resource res);
-int omap4iss_isp_subclk_disable(struct iss_device *iss,
+void omap4iss_isp_subclk_enable(struct iss_device *iss,
 				enum iss_isp_subclk_resource res);
+void omap4iss_isp_subclk_disable(struct iss_device *iss,
+				 enum iss_isp_subclk_resource res);
 
 void omap4iss_isp_enable_interrupts(struct iss_device *iss);
 void omap4iss_isp_disable_interrupts(struct iss_device *iss);