[PATCH 3/5 v10] usb: musb: core: added missing const qualifier to musb_hdrc_platform_data::config

[Petr Kulhavy <petr-Qh/3xLP0EvwAvxtiuMwx3w@public.gmane.org>]

The musb_hdrc_platform_data::config 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-Qh/3xLP0EvwAvxtiuMwx3w@public.gmane.org>
Acked-by: Sergei Shtylyov <sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
Signed-off-by: Bin Liu <b-liu-l0cyMroinI0@public.gmane.org>
---
v5: <initial>

v6:
 - whitespace formatting corrected

v7: <no change>
v8: <no change>
v9: <no change>
v10: <no change>

 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 6a2d6d3..b0be1a9 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1920,7 +1920,7 @@ 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 3f7a325..a062185 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..0b3da40 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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