Input: uinput - specify exact bit sizes on userspace APIs

Switch to using __u32/__s32 instead of ordinary 'int' in structures
forming userspace API.

Also internally make request_id unsigned int.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/misc/uinput.c

@@ -59,7 +59,7 @@ static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned i
 static bool uinput_request_alloc_id(struct uinput_device *udev,
 				    struct uinput_request *request)
 {
-	int id;
+	unsigned int id;
 	bool reserved = false;
 
 	spin_lock(&udev->requests_lock);
@@ -77,10 +77,11 @@ static bool uinput_request_alloc_id(struct uinput_device *udev,
 	return reserved;
 }
 
-static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id)
+static struct uinput_request *uinput_request_find(struct uinput_device *udev,
+						  unsigned int id)
 {
 	/* Find an input request, by ID. Returns NULL if the ID isn't valid. */
-	if (id >= UINPUT_NUM_REQUESTS || id < 0)
+	if (id >= UINPUT_NUM_REQUESTS)
 		return NULL;
 
 	return udev->requests[id];
@@ -556,8 +557,8 @@ static int uinput_release(struct inode *inode, struct file *file)
 
 #ifdef CONFIG_COMPAT
 struct uinput_ff_upload_compat {
-	int			request_id;
-	int			retval;
+	__u32			request_id;
+	__s32			retval;
 	struct ff_effect_compat	effect;
 	struct ff_effect_compat	old;
 };

include/linux/uinput.h

@@ -32,6 +32,7 @@
  *		- first public version
  */
 
+#include <linux/types.h>
 #include <linux/input.h>
 
 #define UINPUT_VERSION		3
@@ -44,14 +45,14 @@
 enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
 
 struct uinput_request {
-	int			id;
-	int			code;	/* UI_FF_UPLOAD, UI_FF_ERASE */
+	unsigned int		id;
+	unsigned int		code;	/* UI_FF_UPLOAD, UI_FF_ERASE */
 
 	int			retval;
 	struct completion	done;
 
 	union {
-		int		effect_id;
+		unsigned int	effect_id;
 		struct {
 			struct ff_effect *effect;
 			struct ff_effect *old;
@@ -77,16 +78,16 @@ struct uinput_device {
 #endif	/* __KERNEL__ */
 
 struct uinput_ff_upload {
-	int			request_id;
-	int			retval;
+	__u32			request_id;
+	__s32			retval;
 	struct ff_effect	effect;
 	struct ff_effect	old;
 };
 
 struct uinput_ff_erase {
-	int			request_id;
-	int			retval;
-	int			effect_id;
+	__u32			request_id;
+	__s32			retval;
+	__u32			effect_id;
 };
 
 /* ioctl */
@@ -166,11 +167,11 @@ struct uinput_ff_erase {
 struct uinput_user_dev {
 	char name[UINPUT_MAX_NAME_SIZE];
 	struct input_id id;
-	int ff_effects_max;
-	int absmax[ABS_CNT];
-	int absmin[ABS_CNT];
-	int absfuzz[ABS_CNT];
-	int absflat[ABS_CNT];
+	__u32 ff_effects_max;
+	__s32 absmax[ABS_CNT];
+	__s32 absmin[ABS_CNT];
+	__s32 absfuzz[ABS_CNT];
+	__s32 absflat[ABS_CNT];
 };
 #endif	/* __UINPUT_H_ */