create_singlethread_workqueue may fail and return NULL. The fix
checks if it is NULL to avoid NULL pointer dereference.
Also, the fix moves the call of create_singlethread_workqueue
earlier to avoid resource-release issues.
--
V3: do not introduce memory leaks.
Signed-off-by: Kangjie Lu <k...@umn.edu>
---
drivers/hid/hid-logitech-hidpp.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 15ed6177a7a3..0a243247b231 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2111,6 +2111,13 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8
feature_index)
kfree(data);
return -ENOMEM;
}
+ data->wq = create_singlethread_workqueue("hidpp-ff-sendqueue");
+ if (!data->wq) {
+ kfree(data->effect_ids);
+ kfree(data);
+ return -ENOMEM;
+ }
+
data->hidpp = hidpp;
data->feature_index = feature_index;
data->version = version;
@@ -2155,7 +2162,6 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8
feature_index)
/* ignore boost value at response.fap.params[2] */
/* init the hardware command queue */
- data->wq = create_singlethread_workqueue("hidpp-ff-sendqueue");
atomic_set(&data->workqueue_size, 0);
/* initialize with zero autocenter to get wheel in usable state */
--
2.17.1
