The debugfs_create_dir() function returns NULL if an error occurs. This patch
adds check of the result of the debufs_create_dir() execution in the
hid_debug_register().
Signed-off-by: Alexander Kuleshov <kuleshovmail@xxxxxxxxx>
---
drivers/hid/hid-core.c | 6 ++++--
drivers/hid/hid-debug.c | 3 +++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index e6fce23..315a980 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2599,8 +2599,10 @@ int hid_add_device(struct hid_device *hdev)
ret = device_add(&hdev->dev);
if (!ret)
hdev->status |= HID_STAT_ADDED;
- else
- hid_debug_unregister(hdev);
+ else {
+ if (hdev->debug_dir)
+ hid_debug_unregister(hdev);
+ }
return ret;
}
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index 2886b64..80fa03d 100644
--- a/drivers/hid/hid-debug.c
+++ b/drivers/hid/hid-debug.c
@@ -1223,6 +1223,9 @@ static const struct file_operations hid_debug_events_fops = {
void hid_debug_register(struct hid_device *hdev, const char *name)
{
hdev->debug_dir = debugfs_create_dir(name, hid_debug_root);
+ if (!hdev->debug_dir)
+ return -ENOMEM;
+
hdev->debug_rdesc = debugfs_create_file("rdesc", 0400,
hdev->debug_dir, hdev, &hid_debug_rdesc_fops);
hdev->debug_events = debugfs_create_file("events", 0400,
--
2.5.0
--
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