USB: otg: add otg_put_transceiver()

As Russell King points out, calling put_device(otg_transceiver->dev)
directly in driver cleanup paths makes assumptions about otg_transceiver
internals.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 9 insertions, 2 deletions

diff --git a/arch/arm/plat-omap/usb.c b/arch/arm/plat-omap/usb.c
index 67ca1e216df7..2f88ca8b8f38 100644
--- a/arch/arm/plat-omap/usb.c
+++ b/arch/arm/plat-omap/usb.c
@@ -96,6 +96,12 @@ struct otg_transceiver *otg_get_transceiver(void)
 }
 EXPORT_SYMBOL(otg_get_transceiver);
 
+void otg_put_transceiver(struct otg_transceiver *x)
+{
+        put_device(x->dev);
+}
+EXPORT_SYMBOL(otg_put_transceiver);
+
 int otg_set_transceiver(struct otg_transceiver *x)
 {
         if (xceiv && x)
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index 34e9e393f929..57d9641c6bf8 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -3006,7 +3006,7 @@ cleanup1:
 
 cleanup0:
         if (xceiv)
-                put_device(xceiv->dev);
+                otg_put_transceiver(xceiv);
 
         if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
                 clk_disable(hhc_clk);
@@ -3034,7 +3034,7 @@ static int __exit omap_udc_remove(struct platform_device *pdev)
 
         pullup_disable(udc);
         if (udc->transceiver) {
-                put_device(udc->transceiver->dev);
+                otg_put_transceiver(udc->transceiver);
                 udc->transceiver = NULL;
         }
         omap_writew(0, UDC_SYSCON1);
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 1db25d152ad8..94df4fe6c6c0 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -84,6 +84,7 @@ extern int otg_set_transceiver(struct otg_transceiver *);
 
 /* for usb host and peripheral controller drivers */
 extern struct otg_transceiver *otg_get_transceiver(void);
+extern void otg_put_transceiver(struct otg_transceiver *);
 
 static inline int
 otg_start_hnp(struct otg_transceiver *otg)