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serial2002: switch to __vfs_read/__vfs_write

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-04-03 15:14:42 -04:00
parent e145286685
commit 79ff50c09e
1 changed files with 6 additions and 12 deletions
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18
drivers/staging/comedi/drivers/serial2002.c
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@ -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;
}