diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/serial2002.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/serial2002.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/drivers/staging/comedi/drivers/serial2002.c b/drivers/staging/comedi/drivers/serial2002.c index 71226ee9064e..304ebff119ee 100644 --- a/drivers/staging/comedi/drivers/serial2002.c +++ b/drivers/staging/comedi/drivers/serial2002.c @@ -39,14 +39,12 @@ Status: in development #include <linux/poll.h> struct serial2002_range_table_t { - /* HACK... */ int length; struct comedi_krange range; }; struct serial2002_private { - int port; /* /dev/ttyS<port> */ int speed; /* baudrate */ struct file *tty; @@ -110,24 +108,16 @@ 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; @@ -145,8 +135,8 @@ static void serial2002_tty_read_poll_wait(struct file *f, int timeout) break; } do_gettimeofday(&now); - elapsed = (1000000 * (now.tv_sec - start.tv_sec) + - now.tv_usec - start.tv_usec); + elapsed = 1000000 * (now.tv_sec - start.tv_sec) + + now.tv_usec - start.tv_usec; if (elapsed > timeout) break; set_current_state(TASK_INTERRUPTIBLE); @@ -163,13 +153,15 @@ 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 +172,7 @@ 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; } @@ -300,7 +292,6 @@ static struct serial_data serial2002_read(struct file *f, int timeout) } } return result; - } static void serial2002_write(struct file *f, struct serial_data data) |