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speedtch: don't abuse struct delayed_work 

speedtch directly uses the internal timer and work members of a struct
delayed_work.  Use a separate work item and timer instead.

* Nicolas Kaiser discovered that timer init was missing.  Fixed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Tested-by: Nicolas Kaiser <nikai@nikai.net>
Cc: Duncan Sands <duncan.sands@free.fr>
Cc: linux-usb@vger.kernel.org
This commit is contained in:
Tejun Heo 2010-12-24 16:14:20 +01:00
parent 8c71778cbf
commit 37c95bfe94
1 changed files with 14 additions and 12 deletions
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26
drivers/usb/atm/speedtch.c
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@ -139,7 +139,8 @@ struct speedtch_instance_data {
struct speedtch_params params; /* set in probe, constant afterwards */ struct speedtch_params params; /* set in probe, constant afterwards */
struct delayed_work status_checker; struct timer_list status_check_timer;
struct work_struct status_check_work;
unsigned char last_status; unsigned char last_status;
@ -498,7 +499,7 @@ static void speedtch_check_status(struct work_struct *work)
{ {
struct speedtch_instance_data *instance = struct speedtch_instance_data *instance =
container_of(work, struct speedtch_instance_data, container_of(work, struct speedtch_instance_data,
status_checker.work); status_check_work);
struct usbatm_data *usbatm = instance->usbatm; struct usbatm_data *usbatm = instance->usbatm;
struct atm_dev *atm_dev = usbatm->atm_dev; struct atm_dev *atm_dev = usbatm->atm_dev;
unsigned char *buf = instance->scratch_buffer; unsigned char *buf = instance->scratch_buffer;
@ -575,11 +576,11 @@ static void speedtch_status_poll(unsigned long data)
{ {
struct speedtch_instance_data *instance = (void *)data; struct speedtch_instance_data *instance = (void *)data;
schedule_delayed_work(&instance->status_checker, 0); schedule_work(&instance->status_check_work);
/* The following check is racy, but the race is harmless */ /* The following check is racy, but the race is harmless */
if (instance->poll_delay < MAX_POLL_DELAY) if (instance->poll_delay < MAX_POLL_DELAY)
mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(instance->poll_delay)); mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(instance->poll_delay));
else else
atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n"); atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n");
} }
@ -595,7 +596,7 @@ static void speedtch_resubmit_int(unsigned long data)
if (int_urb) { if (int_urb) {
ret = usb_submit_urb(int_urb, GFP_ATOMIC); ret = usb_submit_urb(int_urb, GFP_ATOMIC);
if (!ret) if (!ret)
schedule_delayed_work(&instance->status_checker, 0); schedule_work(&instance->status_check_work);
else { else {
atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
@ -624,7 +625,7 @@ static void speedtch_handle_int(struct urb *int_urb)
} }
if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) { if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) {
del_timer(&instance->status_checker.timer); del_timer(&instance->status_check_timer);
atm_info(usbatm, "DSL line goes up\n"); atm_info(usbatm, "DSL line goes up\n");
} else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) { } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) {
atm_info(usbatm, "DSL line goes down\n"); atm_info(usbatm, "DSL line goes down\n");
@ -640,7 +641,7 @@ static void speedtch_handle_int(struct urb *int_urb)
if ((int_urb = instance->int_urb)) { if ((int_urb = instance->int_urb)) {
ret = usb_submit_urb(int_urb, GFP_ATOMIC); ret = usb_submit_urb(int_urb, GFP_ATOMIC);
schedule_delayed_work(&instance->status_checker, 0); schedule_work(&instance->status_check_work);
if (ret < 0) { if (ret < 0) {
atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
goto fail; goto fail;
@ -686,7 +687,7 @@ static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_de
} }
/* Start status polling */ /* Start status polling */
mod_timer(&instance->status_checker.timer, jiffies + msecs_to_jiffies(1000)); mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000));
return 0; return 0;
} }
@ -698,7 +699,7 @@ static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_de
atm_dbg(usbatm, "%s entered\n", __func__); atm_dbg(usbatm, "%s entered\n", __func__);
del_timer_sync(&instance->status_checker.timer); del_timer_sync(&instance->status_check_timer);
/* /*
* Since resubmit_timer and int_urb can schedule themselves and * Since resubmit_timer and int_urb can schedule themselves and
@ -869,10 +870,11 @@ static int speedtch_bind(struct usbatm_data *usbatm,
usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0); usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
INIT_DELAYED_WORK(&instance->status_checker, speedtch_check_status); INIT_WORK(&instance->status_check_work, speedtch_check_status);
init_timer(&instance->status_check_timer);
instance->status_checker.timer.function = speedtch_status_poll; instance->status_check_timer.function = speedtch_status_poll;
instance->status_checker.timer.data = (unsigned long)instance; instance->status_check_timer.data = (unsigned long)instance;
instance->last_status = 0xff; instance->last_status = 0xff;
instance->poll_delay = MIN_POLL_DELAY; instance->poll_delay = MIN_POLL_DELAY;