serial2002: switch to __vfs_read/__vfs_write
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/staging/comedi/drivers/serial2002.c b/drivers/staging/comedi/drivers/serial2002.c
index 71226ee..a7f170e 100644
--- a/drivers/staging/comedi/drivers/serial2002.c
+++ b/drivers/staging/comedi/drivers/serial2002.c
@@ -110,24 +110,16 @@
{
const char __user *p = (__force const char __user *)buf;
int result;
+ loff_t offset = 0;
mm_segment_t oldfs;
oldfs = get_fs();
set_fs(KERNEL_DS);
- f->f_pos = 0;
- result = f->f_op->write(f, p, count, &f->f_pos);
+ result = __vfs_write(f, p, count, &offset);
set_fs(oldfs);
return result;
}
-static int serial2002_tty_readb(struct file *f, unsigned char *buf)
-{
- char __user *p = (__force char __user *)buf;
-
- f->f_pos = 0;
- return f->f_op->read(f, p, 1, &f->f_pos);
-}
-
static void serial2002_tty_read_poll_wait(struct file *f, int timeout)
{
struct poll_wqueues table;
@@ -163,13 +155,15 @@
result = -1;
if (!IS_ERR(f)) {
mm_segment_t oldfs;
+ char __user *p = (__force char __user *)&ch;
+ loff_t offset = 0;
oldfs = get_fs();
set_fs(KERNEL_DS);
if (f->f_op->poll) {
serial2002_tty_read_poll_wait(f, timeout);
- if (serial2002_tty_readb(f, &ch) == 1)
+ if (__vfs_read(f, p, 1, &offset) == 1)
result = ch;
} else {
/* Device does not support poll, busy wait */
@@ -180,7 +174,7 @@
if (retries >= timeout)
break;
- if (serial2002_tty_readb(f, &ch) == 1) {
+ if (__vfs_read(f, p, 1, &offset) == 1) {
result = ch;
break;
}