summaryrefslogtreecommitdiffstats
path: root/drivers/pcmcia
diff options
context:
space:
mode:
authorSteven Rostedt (Google) <rostedt@goodmis.org>2022-12-20 13:45:19 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2022-12-25 13:38:09 -0800
commit292a089d78d3e2f7944e60bb897c977785a321e3 (patch)
treec9bdd3ea73fe57a35b358770998396cbc5813031 /drivers/pcmcia
parent72a85e2b0a1e1e6fb4ee51ae902730212b2de25c (diff)
downloadlinux-292a089d78d3e2f7944e60bb897c977785a321e3.tar.gz
linux-292a089d78d3e2f7944e60bb897c977785a321e3.tar.bz2
linux-292a089d78d3e2f7944e60bb897c977785a321e3.zip
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/pcmcia')
-rw-r--r--drivers/pcmcia/bcm63xx_pcmcia.c2
-rw-r--r--drivers/pcmcia/electra_cf.c2
-rw-r--r--drivers/pcmcia/omap_cf.c2
-rw-r--r--drivers/pcmcia/pd6729.c4
-rw-r--r--drivers/pcmcia/yenta_socket.c4
5 files changed, 7 insertions, 7 deletions
diff --git a/drivers/pcmcia/bcm63xx_pcmcia.c b/drivers/pcmcia/bcm63xx_pcmcia.c
index bb06311d0b5f..dd3c26099048 100644
--- a/drivers/pcmcia/bcm63xx_pcmcia.c
+++ b/drivers/pcmcia/bcm63xx_pcmcia.c
@@ -443,7 +443,7 @@ static int bcm63xx_drv_pcmcia_remove(struct platform_device *pdev)
struct resource *res;
skt = platform_get_drvdata(pdev);
- del_timer_sync(&skt->timer);
+ timer_shutdown_sync(&skt->timer);
iounmap(skt->base);
iounmap(skt->io_base);
res = skt->reg_res;
diff --git a/drivers/pcmcia/electra_cf.c b/drivers/pcmcia/electra_cf.c
index 40a5cffe24a4..efc27bc15152 100644
--- a/drivers/pcmcia/electra_cf.c
+++ b/drivers/pcmcia/electra_cf.c
@@ -317,7 +317,7 @@ static int electra_cf_remove(struct platform_device *ofdev)
cf->active = 0;
pcmcia_unregister_socket(&cf->socket);
free_irq(cf->irq, cf);
- del_timer_sync(&cf->timer);
+ timer_shutdown_sync(&cf->timer);
iounmap(cf->io_virt);
iounmap(cf->mem_base);
diff --git a/drivers/pcmcia/omap_cf.c b/drivers/pcmcia/omap_cf.c
index d3f827d4224a..e613818dc0bc 100644
--- a/drivers/pcmcia/omap_cf.c
+++ b/drivers/pcmcia/omap_cf.c
@@ -296,7 +296,7 @@ static int __exit omap_cf_remove(struct platform_device *pdev)
cf->active = 0;
pcmcia_unregister_socket(&cf->socket);
- del_timer_sync(&cf->timer);
+ timer_shutdown_sync(&cf->timer);
release_mem_region(cf->phys_cf, SZ_8K);
free_irq(cf->irq, cf);
kfree(cf);
diff --git a/drivers/pcmcia/pd6729.c b/drivers/pcmcia/pd6729.c
index f0af9985ca09..a0a2e7f18356 100644
--- a/drivers/pcmcia/pd6729.c
+++ b/drivers/pcmcia/pd6729.c
@@ -727,7 +727,7 @@ err_out_free_res2:
if (irq_mode == 1)
free_irq(dev->irq, socket);
else
- del_timer_sync(&socket->poll_timer);
+ timer_shutdown_sync(&socket->poll_timer);
err_out_free_res:
pci_release_regions(dev);
err_out_disable:
@@ -754,7 +754,7 @@ static void pd6729_pci_remove(struct pci_dev *dev)
if (irq_mode == 1)
free_irq(dev->irq, socket);
else
- del_timer_sync(&socket->poll_timer);
+ timer_shutdown_sync(&socket->poll_timer);
pci_release_regions(dev);
pci_disable_device(dev);
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 3966a6ceb1ac..1365eaa20ff4 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -814,7 +814,7 @@ static void yenta_close(struct pci_dev *dev)
if (sock->cb_irq)
free_irq(sock->cb_irq, sock);
else
- del_timer_sync(&sock->poll_timer);
+ timer_shutdown_sync(&sock->poll_timer);
iounmap(sock->base);
yenta_free_resources(sock);
@@ -1285,7 +1285,7 @@ static int yenta_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (socket->cb_irq)
free_irq(socket->cb_irq, socket);
else
- del_timer_sync(&socket->poll_timer);
+ timer_shutdown_sync(&socket->poll_timer);
unmap:
iounmap(socket->base);
yenta_free_resources(socket);