fbdev: pass struct fb_info to fb_read and fb_write

It is unnecessary to pass struct file to fb_read() and fb_write() in struct
fb_ops. For consistency with the other methods, pass struct fb_info instead.
Signed-off-by: NAntonino Daplas <adaplas@gmail.com>
Acked-by: NPaul Mundt <lethal@linux-sh.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/arcfb.c

@@ -440,14 +440,11 @@ static int arcfb_ioctl(struct fb_info *info,
  * the fb. it's inefficient for them to do anything less than 64*8
  * writes since we update the lcd in each write() anyway.
  */
-static ssize_t arcfb_write(struct file *file, const char __user *buf, size_t count,
-				loff_t *ppos)
+static ssize_t arcfb_write(struct fb_info *info, const char __user *buf,
+			   size_t count, loff_t *ppos)
 {
 	/* modded from epson 1355 */
 
-	struct inode *inode;
-	int fbidx;
-	struct fb_info *info;
 	unsigned long p;
 	int err=-EINVAL;
 	unsigned int fbmemlength,x,y,w,h, bitppos, startpos, endpos, bitcount;
@@ -455,13 +452,6 @@ static ssize_t arcfb_write(struct file *file, const char __user *buf, size_t cou
 	unsigned int xres;
 
 	p = *ppos;
-	inode = file->f_path.dentry->d_inode;
-	fbidx = iminor(inode);
-	info = registered_fb[fbidx];
-
-	if (!info || !info->screen_base)
-		return -ENODEV;
-
 	par = info->par;
 	xres = info->var.xres;
 	fbmemlength = (xres * info->var.yres)/8;

drivers/video/epson1355fb.c

@@ -403,17 +403,10 @@ static inline unsigned long copy_to_user16(void *to, const void *from,
 
 
 static ssize_t
-epson1355fb_read(struct file *file, char *buf, size_t count, loff_t * ppos)
+epson1355fb_read(struct fb_info *info, char *buf, size_t count, loff_t * ppos)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
-	int fbidx = iminor(inode);
-	struct fb_info *info = registered_fb[fbidx];
 	unsigned long p = *ppos;
 
-	/* from fbmem.c except for our own copy_*_user */
-	if (!info || !info->screen_base)
-		return -ENODEV;
-
 	if (p >= info->fix.smem_len)
 		return 0;
 	if (count >= info->fix.smem_len)
@@ -434,19 +427,12 @@ epson1355fb_read(struct file *file, char *buf, size_t count, loff_t * ppos)
 }
 
 static ssize_t
-epson1355fb_write(struct file *file, const char *buf,
+epson1355fb_write(struct fb_info *info, const char *buf,
 		  size_t count, loff_t * ppos)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
-	int fbidx = iminor(inode);
-	struct fb_info *info = registered_fb[fbidx];
 	unsigned long p = *ppos;
 	int err;
 
-	/* from fbmem.c except for our own copy_*_user */
-	if (!info || !info->screen_base)
-		return -ENODEV;
-
 	/* from fbmem.c except for our own copy_*_user */
 	if (p > info->fix.smem_len)
 		return -ENOSPC;

drivers/video/fbmem.c

@@ -588,7 +588,7 @@ fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 		return -EPERM;
 
 	if (info->fbops->fb_read)
-		return info->fbops->fb_read(file, buf, count, ppos);
+		return info->fbops->fb_read(info, buf, count, ppos);
 	
 	total_size = info->screen_size;
 
@@ -663,7 +663,7 @@ fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 		return -EPERM;
 
 	if (info->fbops->fb_write)
-		return info->fbops->fb_write(file, buf, count, ppos);
+		return info->fbops->fb_write(info, buf, count, ppos);
 	
 	total_size = info->screen_size;
 

drivers/video/hecubafb.c

@@ -267,12 +267,9 @@ static void hecubafb_imageblit(struct fb_info *info,
  * this is the slow path from userspace. they can seek and write to
  * the fb. it's inefficient to do anything less than a full screen draw
  */
-static ssize_t hecubafb_write(struct file *file, const char __user *buf,
+static ssize_t hecubafb_write(struct fb_info *info, const char __user *buf,
 				size_t count, loff_t *ppos)
 {
-	struct inode *inode;
-	int fbidx;
-	struct fb_info *info;
 	unsigned long p;
 	int err=-EINVAL;
 	struct hecubafb_par *par;
@@ -280,13 +277,6 @@ static ssize_t hecubafb_write(struct file *file, const char __user *buf,
 	unsigned int fbmemlength;
 
 	p = *ppos;
-	inode = file->f_dentry->d_inode;
-	fbidx = iminor(inode);
-	info = registered_fb[fbidx];
-
-	if (!info || !info->screen_base)
-		return -ENODEV;
-
 	par = info->par;
 	xres = info->var.xres;
 	fbmemlength = (xres * info->var.yres)/8;

drivers/video/pvr2fb.c

@@ -214,7 +214,7 @@ static int pvr2_init_cable(void);
 static int pvr2_get_param(const struct pvr2_params *p, const char *s,
                             int val, int size);
 #ifdef CONFIG_SH_DMA
-static ssize_t pvr2fb_write(struct file *file, const char *buf,
+static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
 			    size_t count, loff_t *ppos);
 #endif
 
@@ -674,7 +674,7 @@ static int pvr2_init_cable(void)
 }
 
 #ifdef CONFIG_SH_DMA
-static ssize_t pvr2fb_write(struct file *file, const char *buf,
+static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
 			    size_t count, loff_t *ppos)
 {
 	unsigned long dst, start, end, len;

include/linux/fb.h

@@ -591,8 +591,10 @@ struct fb_ops {
 	/* For framebuffers with strange non linear layouts or that do not
 	 * work with normal memory mapped access
 	 */
-	ssize_t (*fb_read)(struct file *file, char __user *buf, size_t count, loff_t *ppos);
-	ssize_t (*fb_write)(struct file *file, const char __user *buf, size_t count, loff_t *ppos);
+	ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
+			   size_t count, loff_t *ppos);
+	ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
+			    size_t count, loff_t *ppos);
 
 	/* checks var and eventually tweaks it to something supported,
 	 * DO NOT MODIFY PAR */