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staging/irda-usb: Convert timers to use timer_setup()

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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. This requires adding a pointer to
hold the timer's target URB, as there won't be a way to pass this in the
future.

Cc: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook 2017-10-18 13:23:07 -07:00 committed by Greg Kroah-Hartman
parent 5eb54a9997
commit 3de1abef24
2 changed files with 7 additions and 14 deletions
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20
drivers/staging/irda/drivers/irda-usb.c
View file

@ -117,7 +117,7 @@ static void irda_usb_close(struct irda_usb_cb *self);
static void speed_bulk_callback(struct urb *urb);
static void write_bulk_callback(struct urb *urb);
static void irda_usb_receive(struct urb *urb);
static void irda_usb_rx_defer_expired(unsigned long data);
static void irda_usb_rx_defer_expired(struct timer_list *t);
static int irda_usb_net_open(struct net_device *dev);
static int irda_usb_net_close(struct net_device *dev);
static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
@ -846,8 +846,7 @@ static void irda_usb_receive(struct urb *urb)
* hot unplug of the dongle...
* Lowest effective timer is 10ms...
* Jean II */
self->rx_defer_timer.function = irda_usb_rx_defer_expired;
self->rx_defer_timer.data = (unsigned long) urb;
self->rx_defer_timer_urb = urb;
mod_timer(&self->rx_defer_timer,
jiffies + msecs_to_jiffies(10));
@ -953,20 +952,13 @@ static void irda_usb_receive(struct urb *urb)
* In case of errors, we want the USB layer to have time to recover.
* Now, it is time to resubmit ouur Rx URB...
*/
static void irda_usb_rx_defer_expired(unsigned long data)
static void irda_usb_rx_defer_expired(struct timer_list *t)
{
struct urb *urb = (struct urb *) data;
struct irda_usb_cb *self = from_timer(self, t, rx_defer_timer);
struct urb *urb = self->rx_defer_timer_urb;
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct irda_usb_cb *self;
struct irda_skb_cb *cb;
struct urb *next_urb;
/* Find ourselves */
cb = (struct irda_skb_cb *) skb->cb;
IRDA_ASSERT(cb != NULL, return;);
self = (struct irda_usb_cb *) cb->context;
IRDA_ASSERT(self != NULL, return;);
/* Same stuff as when Rx is done, see above... */
next_urb = self->idle_rx_urb;
urb->context = NULL;
@ -1622,7 +1614,7 @@ static int irda_usb_probe(struct usb_interface *intf,
self = netdev_priv(net);
self->netdev = net;
spin_lock_init(&self->lock);
init_timer(&self->rx_defer_timer);
timer_setup(&self->rx_defer_timer, irda_usb_rx_defer_expired, 0);
self->capability = id->driver_info;
self->needspatch = ((self->capability & IUC_STIR421X) != 0);

1
drivers/staging/irda/drivers/irda-usb.h
View file

@ -170,5 +170,6 @@ struct irda_usb_cb {
int needspatch; /* device needs firmware patch */
struct timer_list rx_defer_timer; /* Wait for Rx error to clear */
struct urb *rx_defer_timer_urb; /* URB attached to rx_defer_timer */
};