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pps: timestamp is always passed to dcd_change()

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Remove the code that gatheres timestamp in pps_tty_dcd_change() in case
passed ts parameter is NULL because it never happens in the current code.
Fix comments as well.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Gordeev 2011-01-12 17:00:55 -08:00 committed by Linus Torvalds
parent 818b9eefe7
commit 12f9b1f9c1
3 changed files with 2 additions and 10 deletions
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2
Documentation/serial/tty.txt
View File

@ -107,7 +107,7 @@ write_wakeup() - May be called at any point between open and close.
dcd_change() - Report to the tty line the current DCD pin status
changes and the relative timestamp. The timestamp
can be NULL.
cannot be NULL.
Driver Access

8
drivers/pps/clients/pps-ldisc.c
View File

@ -32,14 +32,6 @@ static void pps_tty_dcd_change(struct tty_struct *tty, unsigned int status,
struct pps_event_time *ts)
{
struct pps_device *pps = (struct pps_device *)tty->disc_data;
struct pps_event_time __ts;
/* First of all we get the time stamp... */
pps_get_ts(&__ts);
/* Does caller give us a timestamp? */
if (!ts) /* No. Do it ourself! */
ts = &__ts;
BUG_ON(pps == NULL);

2
include/linux/tty_ldisc.h
View File

@ -104,7 +104,7 @@
* struct pps_event_time *ts)
*
* Tells the discipline that the DCD pin has changed its status and
* the relative timestamp. Pointer ts can be NULL.
* the relative timestamp. Pointer ts cannot be NULL.
*/
#include <linux/fs.h>