[PATCH 5/5] usb: musb: core: added missing const qualifier to the config pointer in platform data

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The "config" in struct musb_hdrc_platform_data was defined as a non-const
pointer. However some drivers (e.g. the ux500) set up this pointer to point
to a static structure, which is potentially dangerous. Since the musb core 
uses the pointer in a read-only manner the const qualifier was added to 
protect the content of the config.

Signed-off-by: Petr Kulhavy <petr@xxxxxxxxx>
---
 drivers/usb/musb/musb_core.c | 2 +-
 drivers/usb/musb/musb_core.h | 2 +-
 include/linux/usb/musb.h     | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index f96a79a..0dc0d11 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1937,7 +1937,7 @@ static void musb_recover_from_babble(struct musb *musb)
  */
 
 static struct musb *allocate_instance(struct device *dev,
-		struct musb_hdrc_config *config, void __iomem *mbase)
+		const struct musb_hdrc_config *config, void __iomem *mbase)
 {
 	struct musb		*musb;
 	struct musb_hw_ep	*ep;
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 1f4754b..d8bedf2 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -438,7 +438,7 @@ struct musb {
 	 */
 	unsigned                double_buffer_not_ok:1;
 
-	struct musb_hdrc_config	*config;
+	const struct musb_hdrc_config	*config;
 
 	int			xceiv_old_state;
 #ifdef CONFIG_DEBUG_FS
diff --git a/include/linux/usb/musb.h b/include/linux/usb/musb.h
index 96ddfb7..a327df8 100644
--- a/include/linux/usb/musb.h
+++ b/include/linux/usb/musb.h
@@ -124,7 +124,7 @@ struct musb_hdrc_platform_data {
 	int		(*set_power)(int state);
 
 	/* MUSB configuration-specific details */
-	struct musb_hdrc_config	*config;
+	const struct musb_hdrc_config	*config;
 
 	/* Architecture specific board data	*/
 	void		*board_data;
-- 
1.9.1

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