[PATCH 32/58] isdn/gigaset: Convert timers to use timer_setup()

From: Kees Cook
Date: Mon Oct 16 2017 - 20:41:40 EST


In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Paul Bolle <pebolle@xxxxxxxxxx>
Cc: Karsten Keil <isdn@xxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Johan Hovold <johan@xxxxxxxxxx>
Cc: gigaset307x-common@xxxxxxxxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
drivers/isdn/gigaset/bas-gigaset.c | 36 ++++++++++++++++++++----------------
drivers/isdn/gigaset/common.c | 7 +++----
2 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index 33151f05e744..c990c6bbffc2 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -433,10 +433,11 @@ static void check_pending(struct bas_cardstate *ucs)
* argument:
* controller state structure
*/
-static void cmd_in_timeout(unsigned long data)
+static void cmd_in_timeout(struct timer_list *t)
{
- struct cardstate *cs = (struct cardstate *) data;
- struct bas_cardstate *ucs = cs->hw.bas;
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_cmd_in);
+ struct urb *urb = ucs->urb_int_in;
+ struct cardstate *cs = urb->context;
int rc;

if (!ucs->rcvbuf_size) {
@@ -639,10 +640,11 @@ static void int_in_work(struct work_struct *work)
* argument:
* controller state structure
*/
-static void int_in_resubmit(unsigned long data)
+static void int_in_resubmit(struct timer_list *t)
{
- struct cardstate *cs = (struct cardstate *) data;
- struct bas_cardstate *ucs = cs->hw.bas;
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_int_in);
+ struct urb *urb = ucs->urb_int_in;
+ struct cardstate *cs = urb->context;
int rc;

if (ucs->retry_int_in++ >= BAS_RETRY) {
@@ -1441,10 +1443,11 @@ static void read_iso_tasklet(unsigned long data)
* argument:
* controller state structure
*/
-static void req_timeout(unsigned long data)
+static void req_timeout(struct timer_list *t)
{
- struct cardstate *cs = (struct cardstate *) data;
- struct bas_cardstate *ucs = cs->hw.bas;
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_ctrl);
+ struct urb *urb = ucs->urb_int_in;
+ struct cardstate *cs = urb->context;
int pending;
unsigned long flags;

@@ -1837,10 +1840,11 @@ static void write_command_callback(struct urb *urb)
* argument:
* controller state structure
*/
-static void atrdy_timeout(unsigned long data)
+static void atrdy_timeout(struct timer_list *t)
{
- struct cardstate *cs = (struct cardstate *) data;
- struct bas_cardstate *ucs = cs->hw.bas;
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_atrdy);
+ struct urb *urb = ucs->urb_int_in;
+ struct cardstate *cs = urb->context;

dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n");

@@ -2213,10 +2217,10 @@ static int gigaset_initcshw(struct cardstate *cs)
}

spin_lock_init(&ucs->lock);
- setup_timer(&ucs->timer_ctrl, req_timeout, (unsigned long) cs);
- setup_timer(&ucs->timer_atrdy, atrdy_timeout, (unsigned long) cs);
- setup_timer(&ucs->timer_cmd_in, cmd_in_timeout, (unsigned long) cs);
- setup_timer(&ucs->timer_int_in, int_in_resubmit, (unsigned long) cs);
+ timer_setup(&ucs->timer_ctrl, req_timeout, 0);
+ timer_setup(&ucs->timer_atrdy, atrdy_timeout, 0);
+ timer_setup(&ucs->timer_cmd_in, cmd_in_timeout, 0);
+ timer_setup(&ucs->timer_int_in, int_in_resubmit, 0);
init_waitqueue_head(&ucs->waitqueue);
INIT_WORK(&ucs->int_in_wq, int_in_work);

diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c
index 7c7814497e3e..15482c5de33c 100644
--- a/drivers/isdn/gigaset/common.c
+++ b/drivers/isdn/gigaset/common.c
@@ -153,9 +153,9 @@ static int test_timeout(struct at_state_t *at_state)
return 1;
}

-static void timer_tick(unsigned long data)
+static void timer_tick(struct timer_list *t)
{
- struct cardstate *cs = (struct cardstate *) data;
+ struct cardstate *cs = from_timer(cs, t, timer);
unsigned long flags;
unsigned channel;
struct at_state_t *at_state;
@@ -687,7 +687,7 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
cs->ignoreframes = ignoreframes;
INIT_LIST_HEAD(&cs->temp_at_states);
cs->running = 0;
- init_timer(&cs->timer); /* clear next & prev */
+ timer_setup(&cs->timer, timer_tick, 0);
spin_lock_init(&cs->ev_lock);
cs->ev_tail = 0;
cs->ev_head = 0;
@@ -768,7 +768,6 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
spin_lock_irqsave(&cs->lock, flags);
cs->running = 1;
spin_unlock_irqrestore(&cs->lock, flags);
- setup_timer(&cs->timer, timer_tick, (unsigned long) cs);
cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK);
add_timer(&cs->timer);

--
2.7.4