pps: access pps device by direct pointer
Using device index as a pointer needs some unnecessary work to be done
every time the pointer is needed (in irq handler for example). Using a
direct pointer is much more easy (and safe 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>
diff --git a/drivers/pps/clients/pps-ktimer.c b/drivers/pps/clients/pps-ktimer.c
index e1bdd8b..966ead1 100644
--- a/drivers/pps/clients/pps-ktimer.c
+++ b/drivers/pps/clients/pps-ktimer.c
@@ -31,7 +31,7 @@
* Global variables
*/
-static int source;
+static struct pps_device *pps;
static struct timer_list ktimer;
/*
@@ -47,7 +47,7 @@
pr_info("PPS event at %lu\n", jiffies);
- pps_event(source, &ts, PPS_CAPTUREASSERT, NULL);
+ pps_event(pps, &ts, PPS_CAPTUREASSERT, NULL);
mod_timer(&ktimer, jiffies + HZ);
}
@@ -56,12 +56,11 @@
* The echo function
*/
-static void pps_ktimer_echo(int source, int event, void *data)
+static void pps_ktimer_echo(struct pps_device *pps, int event, void *data)
{
- pr_info("echo %s %s for source %d\n",
+ dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
- event & PPS_CAPTURECLEAR ? "clear" : "",
- source);
+ event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
@@ -84,30 +83,27 @@
static void __exit pps_ktimer_exit(void)
{
- del_timer_sync(&ktimer);
- pps_unregister_source(source);
+ dev_info(pps->dev, "ktimer PPS source unregistered\n");
- pr_info("ktimer PPS source unregistered\n");
+ del_timer_sync(&ktimer);
+ pps_unregister_source(pps);
}
static int __init pps_ktimer_init(void)
{
- int ret;
-
- ret = pps_register_source(&pps_ktimer_info,
+ pps = pps_register_source(&pps_ktimer_info,
PPS_CAPTUREASSERT | PPS_OFFSETASSERT);
- if (ret < 0) {
+ if (pps == NULL) {
printk(KERN_ERR "cannot register ktimer source\n");
- return ret;
+ return -ENOMEM;
}
- source = ret;
setup_timer(&ktimer, pps_ktimer_event, 0);
mod_timer(&ktimer, jiffies + HZ);
- pr_info("ktimer PPS source registered at %d\n", source);
+ dev_info(pps->dev, "ktimer PPS source registered\n");
- return 0;
+ return 0;
}
module_init(pps_ktimer_init);
diff --git a/drivers/pps/clients/pps-ldisc.c b/drivers/pps/clients/pps-ldisc.c
index 20fc9f7..1517f54 100644
--- a/drivers/pps/clients/pps-ldisc.c
+++ b/drivers/pps/clients/pps-ldisc.c
@@ -29,7 +29,7 @@
static void pps_tty_dcd_change(struct tty_struct *tty, unsigned int status,
struct pps_event_time *ts)
{
- int id = (long)tty->disc_data;
+ struct pps_device *pps = (struct pps_device *)tty->disc_data;
struct pps_event_time __ts;
/* First of all we get the time stamp... */
@@ -39,12 +39,14 @@
if (!ts) /* No. Do it ourself! */
ts = &__ts;
- /* Now do the PPS event report */
- pps_event(id, ts, status ? PPS_CAPTUREASSERT : PPS_CAPTURECLEAR,
- NULL);
+ BUG_ON(pps == NULL);
- pr_debug("PPS %s at %lu on source #%d\n",
- status ? "assert" : "clear", jiffies, id);
+ /* Now do the PPS event report */
+ pps_event(pps, ts, status ? PPS_CAPTUREASSERT :
+ PPS_CAPTURECLEAR, NULL);
+
+ dev_dbg(pps->dev, "PPS %s at %lu\n",
+ status ? "assert" : "clear", jiffies);
}
static int (*alias_n_tty_open)(struct tty_struct *tty);
@@ -54,6 +56,7 @@
struct pps_source_info info;
struct tty_driver *drv = tty->driver;
int index = tty->index + drv->name_base;
+ struct pps_device *pps;
int ret;
info.owner = THIS_MODULE;
@@ -64,34 +67,42 @@
PPS_OFFSETASSERT | PPS_OFFSETCLEAR | \
PPS_CANWAIT | PPS_TSFMT_TSPEC;
- ret = pps_register_source(&info, PPS_CAPTUREBOTH | \
+ pps = pps_register_source(&info, PPS_CAPTUREBOTH | \
PPS_OFFSETASSERT | PPS_OFFSETCLEAR);
- if (ret < 0) {
+ if (pps == NULL) {
pr_err("cannot register PPS source \"%s\"\n", info.path);
- return ret;
+ return -ENOMEM;
}
- tty->disc_data = (void *)(long)ret;
+ tty->disc_data = pps;
/* Should open N_TTY ldisc too */
ret = alias_n_tty_open(tty);
- if (ret < 0)
- pps_unregister_source((long)tty->disc_data);
+ if (ret < 0) {
+ pr_err("cannot open tty ldisc \"%s\"\n", info.path);
+ goto err_unregister;
+ }
- pr_info("PPS source #%d \"%s\" added\n", ret, info.path);
+ dev_info(pps->dev, "source \"%s\" added\n", info.path);
return 0;
+
+err_unregister:
+ tty->disc_data = NULL;
+ pps_unregister_source(pps);
+ return ret;
}
static void (*alias_n_tty_close)(struct tty_struct *tty);
static void pps_tty_close(struct tty_struct *tty)
{
- int id = (long)tty->disc_data;
+ struct pps_device *pps = (struct pps_device *)tty->disc_data;
- pps_unregister_source(id);
alias_n_tty_close(tty);
- pr_info("PPS source #%d removed\n", id);
+ tty->disc_data = NULL;
+ dev_info(pps->dev, "removed\n");
+ pps_unregister_source(pps);
}
static struct tty_ldisc_ops pps_ldisc_ops;