diff options
| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-12-20 13:45:19 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-25 13:38:09 -0800 |
| commit | 292a089d78d3e2f7944e60bb897c977785a321e3 (patch) | |
| tree | c9bdd3ea73fe57a35b358770998396cbc5813031 /drivers/input | |
| parent | 72a85e2b0a1e1e6fb4ee51ae902730212b2de25c (diff) | |
| download | linux-292a089d78d3e2f7944e60bb897c977785a321e3.tar.bz2 | |
treewide: Convert del_timer*() to timer_shutdown*()
Due to several bugs caused by timers being re-armed after they are
shutdown and just before they are freed, a new state of timers was added
called "shutdown". After a timer is set to this state, then it can no
longer be re-armed.
The following script was run to find all the trivial locations where
del_timer() or del_timer_sync() is called in the same function that the
object holding the timer is freed. It also ignores any locations where
the timer->function is modified between the del_timer*() and the free(),
as that is not considered a "trivial" case.
This was created by using a coccinelle script and the following
commands:
$ cat timer.cocci
@@
expression ptr, slab;
identifier timer, rfield;
@@
(
- del_timer(&ptr->timer);
+ timer_shutdown(&ptr->timer);
|
- del_timer_sync(&ptr->timer);
+ timer_shutdown_sync(&ptr->timer);
)
... when strict
when != ptr->timer
(
kfree_rcu(ptr, rfield);
|
kmem_cache_free(slab, ptr);
|
kfree(ptr);
)
$ spatch timer.cocci . > /tmp/t.patch
$ patch -p1 < /tmp/t.patch
Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ]
Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ]
Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/locomokbd.c | 2 | ||||
| -rw-r--r-- | drivers/input/keyboard/omap-keypad.c | 2 | ||||
| -rw-r--r-- | drivers/input/mouse/alps.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/drivers/input/keyboard/locomokbd.c b/drivers/input/keyboard/locomokbd.c index dae053596572..f866c03b9d0e 100644 --- a/drivers/input/keyboard/locomokbd.c +++ b/drivers/input/keyboard/locomokbd.c @@ -310,7 +310,7 @@ static void locomokbd_remove(struct locomo_dev *dev) free_irq(dev->irq[0], locomokbd); - del_timer_sync(&locomokbd->timer); + timer_shutdown_sync(&locomokbd->timer); input_unregister_device(locomokbd->input); locomo_set_drvdata(dev, NULL); diff --git a/drivers/input/keyboard/omap-keypad.c b/drivers/input/keyboard/omap-keypad.c index 57447d6c9007..24440b498645 100644 --- a/drivers/input/keyboard/omap-keypad.c +++ b/drivers/input/keyboard/omap-keypad.c @@ -296,7 +296,7 @@ static int omap_kp_remove(struct platform_device *pdev) omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT); free_irq(omap_kp->irq, omap_kp); - del_timer_sync(&omap_kp->timer); + timer_shutdown_sync(&omap_kp->timer); tasklet_kill(&kp_tasklet); /* unregister everything */ diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c index 4a6b33bbe7ea..989228b5a0a4 100644 --- a/drivers/input/mouse/alps.c +++ b/drivers/input/mouse/alps.c @@ -2970,7 +2970,7 @@ static void alps_disconnect(struct psmouse *psmouse) struct alps_data *priv = psmouse->private; psmouse_reset(psmouse); - del_timer_sync(&priv->timer); + timer_shutdown_sync(&priv->timer); if (priv->dev2) input_unregister_device(priv->dev2); if (!IS_ERR_OR_NULL(priv->dev3)) |