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usb: usbatm: Convert timers to use timer_setup() 

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. Additionally corrects and on-stack
timer usage.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Duncan Sands <duncan.sands@free.fr>
Cc: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
Cc: accessrunner-general@lists.sourceforge.net
Cc: linux-usb@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Allen Pais <allen.lkml@gmail.com>
This commit is contained in:
Kees Cook 2017-10-21 00:12:34 -07:00
parent ff07a23fec
commit 72a9f9a445
3 changed files with 29 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/usb/atm/cxacru.c
View File

@ -547,21 +547,30 @@ static void cxacru_blocking_completion(struct urb *urb)
complete(urb->context);
}
static void cxacru_timeout_kill(unsigned long data)
struct cxacru_timer {
struct timer_list timer;
struct urb *urb;
};
static void cxacru_timeout_kill(struct timer_list *t)
{
usb_unlink_urb((struct urb *) data);
struct cxacru_timer *timer = from_timer(timer, t, timer);
usb_unlink_urb(timer->urb);
}
static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
int *actual_length)
{
struct timer_list timer;
struct cxacru_timer timer = {
.urb = urb,
};
setup_timer(&timer, cxacru_timeout_kill, (unsigned long)urb);
timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
add_timer(&timer);
timer_setup_on_stack(&timer.timer, cxacru_timeout_kill, 0);
mod_timer(&timer.timer, jiffies + msecs_to_jiffies(CMD_TIMEOUT));
wait_for_completion(done);
del_timer_sync(&timer);
del_timer_sync(&timer.timer);
destroy_timer_on_stack(&timer.timer);
if (actual_length)
*actual_length = urb->actual_length;

16
drivers/usb/atm/speedtch.c
View File

@ -557,9 +557,10 @@ static void speedtch_check_status(struct work_struct *work)
}
}
static void speedtch_status_poll(unsigned long data)
static void speedtch_status_poll(struct timer_list *t)
{
struct speedtch_instance_data *instance = (void *)data;
struct speedtch_instance_data *instance = from_timer(instance, t,
status_check_timer);
schedule_work(&instance->status_check_work);
@ -570,9 +571,10 @@ static void speedtch_status_poll(unsigned long data)
atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n");
}
static void speedtch_resubmit_int(unsigned long data)
static void speedtch_resubmit_int(struct timer_list *t)
{
struct speedtch_instance_data *instance = (void *)data;
struct speedtch_instance_data *instance = from_timer(instance, t,
resubmit_timer);
struct urb *int_urb = instance->int_urb;
int ret;
@ -860,13 +862,11 @@ static int speedtch_bind(struct usbatm_data *usbatm,
usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
INIT_WORK(&instance->status_check_work, speedtch_check_status);
setup_timer(&instance->status_check_timer, speedtch_status_poll,
(unsigned long)instance);
timer_setup(&instance->status_check_timer, speedtch_status_poll, 0);
instance->last_status = 0xff;
instance->poll_delay = MIN_POLL_DELAY;
setup_timer(&instance->resubmit_timer, speedtch_resubmit_int,
(unsigned long)instance);
timer_setup(&instance->resubmit_timer, speedtch_resubmit_int, 0);
instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);

10
drivers/usb/atm/usbatm.c
View File

@ -989,18 +989,18 @@ static int usbatm_heavy_init(struct usbatm_data *instance)
return 0;
}
static void usbatm_tasklet_schedule(unsigned long data)
static void usbatm_tasklet_schedule(struct timer_list *t)
{
tasklet_schedule((struct tasklet_struct *) data);
struct usbatm_channel *channel = from_timer(channel, t, delay);
tasklet_schedule(&channel->tasklet);
}
static void usbatm_init_channel(struct usbatm_channel *channel)
{
spin_lock_init(&channel->lock);
INIT_LIST_HEAD(&channel->list);
channel->delay.function = usbatm_tasklet_schedule;
channel->delay.data = (unsigned long) &channel->tasklet;
init_timer(&channel->delay);
timer_setup(&channel->delay, usbatm_tasklet_schedule, 0);
}
int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,