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authorMauro Carvalho Chehab2020-09-07 16:13:06 +0200
committerMauro Carvalho Chehab2020-09-07 16:13:06 +0200
commitd13ee586e026e8166231e03e5345718ebf625c02 (patch)
tree1bf8f5efab7bcf58c1c01fd7e529429e4cd8ada7 /drivers/media/rc/rc-main.c
parent72a9ff3bf7fbd7e887d4e6bbc1c04817da2b9887 (diff)
parentf4d51dffc6c01a9e94650d95ce0104964f8ae822 (diff)
Merge tag 'v5.9-rc4' into patchwork
Linux 5.9-rc4 * tag 'v5.9-rc4': (1001 commits) Linux 5.9-rc4 io_uring: fix linked deferred ->files cancellation io_uring: fix cancel of deferred reqs with ->files include/linux/log2.h: add missing () around n in roundup_pow_of_two() mm/khugepaged.c: fix khugepaged's request size in collapse_file mm/hugetlb: fix a race between hugetlb sysctl handlers mm/hugetlb: try preferred node first when alloc gigantic page from cma mm/migrate: preserve soft dirty in remove_migration_pte() mm/migrate: remove unnecessary is_zone_device_page() check mm/rmap: fixup copying of soft dirty and uffd ptes mm/migrate: fixup setting UFFD_WP flag mm: madvise: fix vma user-after-free checkpatch: fix the usage of capture group ( ... ) fork: adjust sysctl_max_threads definition to match prototype ipc: adjust proc_ipc_sem_dointvec definition to match prototype mm: track page table modifications in __apply_to_page_range() MAINTAINERS: IA64: mark Status as Odd Fixes only MAINTAINERS: add LLVM maintainers MAINTAINERS: update Cavium/Marvell entries mm: slub: fix conversion of freelist_corrupted() ...
Diffstat (limited to 'drivers/media/rc/rc-main.c')
-rw-r--r--drivers/media/rc/rc-main.c44
1 files changed, 28 insertions, 16 deletions
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 3f9a4f1ddc79..1d811e5ffb55 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1292,6 +1292,10 @@ static ssize_t store_protocols(struct device *device,
}
mutex_lock(&dev->lock);
+ if (!dev->registered) {
+ mutex_unlock(&dev->lock);
+ return -ENODEV;
+ }
old_protocols = *current_protocols;
new_protocols = old_protocols;
@@ -1430,6 +1434,10 @@ static ssize_t store_filter(struct device *device,
return -EINVAL;
mutex_lock(&dev->lock);
+ if (!dev->registered) {
+ mutex_unlock(&dev->lock);
+ return -ENODEV;
+ }
new_filter = *filter;
if (fattr->mask)
@@ -1544,6 +1552,10 @@ static ssize_t store_wakeup_protocols(struct device *device,
int i;
mutex_lock(&dev->lock);
+ if (!dev->registered) {
+ mutex_unlock(&dev->lock);
+ return -ENODEV;
+ }
allowed = dev->allowed_wakeup_protocols;
@@ -1601,25 +1613,25 @@ static void rc_dev_release(struct device *device)
kfree(dev);
}
-#define ADD_HOTPLUG_VAR(fmt, val...) \
- do { \
- int err = add_uevent_var(env, fmt, val); \
- if (err) \
- return err; \
- } while (0)
-
static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
{
struct rc_dev *dev = to_rc_dev(device);
+ int ret = 0;
- if (dev->rc_map.name)
- ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);
- if (dev->driver_name)
- ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name);
- if (dev->device_name)
- ADD_HOTPLUG_VAR("DEV_NAME=%s", dev->device_name);
+ mutex_lock(&dev->lock);
- return 0;
+ if (!dev->registered)
+ ret = -ENODEV;
+ if (ret == 0 && dev->rc_map.name)
+ ret = add_uevent_var(env, "NAME=%s", dev->rc_map.name);
+ if (ret == 0 && dev->driver_name)
+ ret = add_uevent_var(env, "DRV_NAME=%s", dev->driver_name);
+ if (ret == 0 && dev->device_name)
+ ret = add_uevent_var(env, "DEV_NAME=%s", dev->device_name);
+
+ mutex_unlock(&dev->lock);
+
+ return ret;
}
/*
@@ -2011,14 +2023,14 @@ void rc_unregister_device(struct rc_dev *dev)
del_timer_sync(&dev->timer_keyup);
del_timer_sync(&dev->timer_repeat);
- rc_free_rx_device(dev);
-
mutex_lock(&dev->lock);
if (dev->users && dev->close)
dev->close(dev);
dev->registered = false;
mutex_unlock(&dev->lock);
+ rc_free_rx_device(dev);
+
/*
* lirc device should be freed with dev->registered = false, so
* that userspace polling will get notified.