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-rw-r--r--arch/mips/lasat/picvue_proc.c113
1 files changed, 68 insertions, 45 deletions
diff --git a/arch/mips/lasat/picvue_proc.c b/arch/mips/lasat/picvue_proc.c
index 0bb6037afba..8e388da1926 100644
--- a/arch/mips/lasat/picvue_proc.c
+++ b/arch/mips/lasat/picvue_proc.c
@@ -4,12 +4,14 @@
* Brian Murphy <brian.murphy@eicon.com>
*
*/
+#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
@@ -38,12 +40,9 @@ static void pvc_display(unsigned long data)
static DECLARE_TASKLET(pvc_display_tasklet, &pvc_display, 0);
-static int pvc_proc_read_line(char *page, char **start,
- off_t off, int count,
- int *eof, void *data)
+static int pvc_line_proc_show(struct seq_file *m, void *v)
{
- char *origpage = page;
- int lineno = *(int *)data;
+ int lineno = *(int *)m->private;
if (lineno < 0 || lineno > PVC_NLINES) {
printk(KERN_WARNING "proc_read_line: invalid lineno %d\n", lineno);
@@ -51,45 +50,66 @@ static int pvc_proc_read_line(char *page, char **start,
}
mutex_lock(&pvc_mutex);
- page += sprintf(page, "%s\n", pvc_lines[lineno]);
+ seq_printf(m, "%s\n", pvc_lines[lineno]);
mutex_unlock(&pvc_mutex);
- return page - origpage;
+ return 0;
}
-static int pvc_proc_write_line(struct file *file, const char *buffer,
- unsigned long count, void *data)
+static int pvc_line_proc_open(struct inode *inode, struct file *file)
{
- int origcount = count;
- int lineno = *(int *)data;
+ return single_open(file, pvc_line_proc_show, PDE(inode)->data);
+}
- if (lineno < 0 || lineno > PVC_NLINES) {
- printk(KERN_WARNING "proc_write_line: invalid lineno %d\n",
- lineno);
- return origcount;
- }
+static ssize_t pvc_line_proc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ int lineno = *(int *)PDE(file->f_path.dentry->d_inode)->data;
+ char kbuf[PVC_LINELEN];
+ size_t len;
+
+ BUG_ON(lineno < 0 || lineno > PVC_NLINES);
- if (count > PVC_LINELEN)
- count = PVC_LINELEN;
+ len = min(count, sizeof(kbuf) - 1);
+ if (copy_from_user(kbuf, buf, len))
+ return -EFAULT;
+ kbuf[len] = '\0';
- if (buffer[count-1] == '\n')
- count--;
+ if (len > 0 && kbuf[len - 1] == '\n')
+ len--;
mutex_lock(&pvc_mutex);
- strncpy(pvc_lines[lineno], buffer, count);
- pvc_lines[lineno][count] = '\0';
+ strncpy(pvc_lines[lineno], kbuf, len);
+ pvc_lines[lineno][len] = '\0';
mutex_unlock(&pvc_mutex);
tasklet_schedule(&pvc_display_tasklet);
- return origcount;
+ return count;
}
-static int pvc_proc_write_scroll(struct file *file, const char *buffer,
- unsigned long count, void *data)
+static const struct file_operations pvc_line_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pvc_line_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = pvc_line_proc_write,
+};
+
+static ssize_t pvc_scroll_proc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
{
- int origcount = count;
- int cmd = simple_strtol(buffer, NULL, 10);
+ char kbuf[42];
+ size_t len;
+ int cmd;
+
+ len = min(count, sizeof(kbuf) - 1);
+ if (copy_from_user(kbuf, buf, len))
+ return -EFAULT;
+ kbuf[len] = '\0';
+
+ cmd = simple_strtol(kbuf, NULL, 10);
mutex_lock(&pvc_mutex);
if (scroll_interval != 0)
@@ -110,22 +130,31 @@ static int pvc_proc_write_scroll(struct file *file, const char *buffer,
}
mutex_unlock(&pvc_mutex);
- return origcount;
+ return count;
}
-static int pvc_proc_read_scroll(char *page, char **start,
- off_t off, int count,
- int *eof, void *data)
+static int pvc_scroll_proc_show(struct seq_file *m, void *v)
{
- char *origpage = page;
-
mutex_lock(&pvc_mutex);
- page += sprintf(page, "%d\n", scroll_dir * scroll_interval);
+ seq_printf(m, "%d\n", scroll_dir * scroll_interval);
mutex_unlock(&pvc_mutex);
- return page - origpage;
+ return 0;
}
+static int pvc_scroll_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pvc_scroll_proc_show, NULL);
+}
+
+static const struct file_operations pvc_scroll_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pvc_scroll_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = pvc_scroll_proc_write,
+};
void pvc_proc_timerfunc(unsigned long data)
{
@@ -163,22 +192,16 @@ static int __init pvc_proc_init(void)
pvc_linedata[i] = i;
}
for (i = 0; i < PVC_NLINES; i++) {
- proc_entry = create_proc_entry(pvc_linename[i], 0644,
- pvc_display_dir);
+ proc_entry = proc_create_data(pvc_linename[i], 0644, pvc_display_dir,
+ &pvc_line_proc_fops, &pvc_linedata[i]);
if (proc_entry == NULL)
goto error;
-
- proc_entry->read_proc = pvc_proc_read_line;
- proc_entry->write_proc = pvc_proc_write_line;
- proc_entry->data = &pvc_linedata[i];
}
- proc_entry = create_proc_entry("scroll", 0644, pvc_display_dir);
+ proc_entry = proc_create("scroll", 0644, pvc_display_dir,
+ &pvc_scroll_proc_fops);
if (proc_entry == NULL)
goto error;
- proc_entry->write_proc = pvc_proc_write_scroll;
- proc_entry->read_proc = pvc_proc_read_scroll;
-
init_timer(&timer);
timer.function = pvc_proc_timerfunc;