PATCH: switch ide-proc to use the ide_key functionality

[Alan Cox <alan@redhat.com>]

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.8-rc3/drivers/ide/ide-proc.c linux-2.6.8-rc3/drivers/ide/ide-proc.c
--- linux.vanilla-2.6.8-rc3/drivers/ide/ide-proc.c	2004-08-09 15:51:00.000000000 +0100
+++ linux-2.6.8-rc3/drivers/ide/ide-proc.c	2004-08-12 17:26:00.000000000 +0100
@@ -355,7 +355,7 @@
 static int proc_ide_read_identify
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *)data;
+	ide_drive_t	*drive = ide_drive_from_key(data);
 	int		len = 0, i = 0;
 	int		err = 0;
 
@@ -397,11 +397,15 @@
 static int proc_ide_read_settings
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
-	ide_settings_t	*setting = (ide_settings_t *) drive->settings;
+	ide_drive_t	*drive = ide_drive_from_key(data);
+	ide_settings_t	*setting;
 	char		*out = page;
 	int		len, rc, mul_factor, div_factor;
+	
+	if(drive == NULL)
+		return -EIO;
 
+	setting = (ide_settings_t *) drive->settings;
 	down(&ide_setting_sem);
 	out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
 	out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
@@ -431,7 +435,7 @@
 static int proc_ide_write_settings(struct file *file, const char __user *buffer,
 				   unsigned long count, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
+	ide_drive_t	*drive = ide_drive_from_key(data);
 	char		name[MAX_LEN + 1];
 	int		for_real = 0;
 	unsigned long	n;
@@ -440,6 +444,9 @@
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EACCES;
+		
+	if (drive == NULL)
+		return -EIO;
 
 	if (count >= PAGE_SIZE)
 		return -EINVAL;
@@ -523,9 +530,12 @@
 int proc_ide_read_capacity
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
+	ide_drive_t	*drive = ide_drive_from_key(data);
 	int		len;
 
+	if(drive == NULL)
+		return -EIO;
+		
 	len = sprintf(page,"%llu\n",
 		      (long long) (DRIVER(drive)->capacity(drive)));
 	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
@@ -534,9 +544,12 @@
 int proc_ide_read_geometry
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
+	ide_drive_t	*drive = ide_drive_from_key(data);
 	char		*out = page;
 	int		len;
+	
+	if(drive == NULL)
+		return -EIO;
 
 	out += sprintf(out,"physical     %d/%d/%d\n",
 			drive->cyl, drive->head, drive->sect);
@@ -552,10 +565,14 @@
 static int proc_ide_read_dmodel
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
-	struct hd_driveid *id = drive->id;
+	ide_drive_t	*drive = ide_drive_from_key(data);
+	struct hd_driveid *id;
 	int		len;
 
+	if(drive == NULL)
+		return -EIO;
+
+	id = drive->id;
 	len = sprintf(page, "%.40s\n",
 		(id && id->model[0]) ? (char *)id->model : "(none)");
 	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
@@ -564,40 +581,30 @@
 static int proc_ide_read_driver
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
-	ide_driver_t	*driver = drive->driver;
+	ide_drive_t	*drive = ide_drive_from_key(data);
+	ide_driver_t	*driver;
 	int		len;
 
+	if(drive == NULL)
+		return -EIO;
+			
+	driver = drive->driver;
+
 	len = sprintf(page, "%s version %s\n",
 			driver->name, driver->version);
 	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 }
 
-static int proc_ide_write_driver
-	(struct file *file, const char __user *buffer, unsigned long count, void *data)
-{
-	ide_drive_t	*drive = (ide_drive_t *) data;
-	char name[32];
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EACCES;
-	if (count > 31)
-		count = 31;
-	if (copy_from_user(name, buffer, count))
-		return -EFAULT;
-	name[count] = '\0';
-	if (ide_replace_subdriver(drive, name))
-		return -EINVAL;
-	return count;
-}
-
 static int proc_ide_read_media
 	(char *page, char **start, off_t off, int count, int *eof, void *data)
 {
-	ide_drive_t	*drive = (ide_drive_t *) data;
+	ide_drive_t	*drive = ide_drive_from_key(data);
 	const char	*media;
 	int		len;
 
+	if(drive == NULL)
+		return -EINVAL;
+
 	switch (drive->media) {
 		case ide_disk:	media = "disk\n";
 				break;
@@ -616,7 +623,7 @@
 }
 
 static ide_proc_entry_t generic_drive_entries[] = {
-	{ "driver",	S_IFREG|S_IRUGO,	proc_ide_read_driver,	proc_ide_write_driver },
+	{ "driver",	S_IFREG|S_IRUGO,	proc_ide_read_driver,	NULL },
 	{ "identify",	S_IFREG|S_IRUSR,	proc_ide_read_identify,	NULL },
 	{ "media",	S_IFREG|S_IRUGO,	proc_ide_read_media,	NULL },
 	{ "model",	S_IFREG|S_IRUGO,	proc_ide_read_dmodel,	NULL },
@@ -668,7 +675,7 @@
 
 		drive->proc = proc_mkdir(drive->name, parent);
 		if (drive->proc)
-			ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
+			ide_add_proc_entries(drive->proc, generic_drive_entries, ide_drive_to_key(drive));
 		sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
 		ent = proc_symlink(drive->name, proc_ide_root, name);
 		if (!ent) return;


Signed-off-by: Alan Cox <alan@redhat.com>