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 71226ee9064efc4c829a6b8804ac620df61551ac..a7f170e60633bcd8c70acd685870e37a1045f938 100644 (file)
--- a/drivers/staging/comedi/drivers/serial2002.c
+++ b/drivers/staging/comedi/drivers/serial2002.c
@@ -110,24 +110,16 @@ static int serial2002_tty_write(struct file *f, unsigned char *buf, int count)
 {
        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 @@ static int serial2002_tty_read(struct file *f, int timeout)
        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 @@ static int serial2002_tty_read(struct file *f, int timeout)
                                if (retries >= timeout)
                                        break;
 
-                               if (serial2002_tty_readb(f, &ch) == 1) {
+                               if (__vfs_read(f, p, 1, &offset) == 1) {
                                        result = ch;
                                        break;
                                }