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.
Signed-off-by: Kangjie Lu <k...@umn.edu>
---
drivers/hid/hid-logitech-hidpp.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 15ed6177a7a3..1b7c336cae6d 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2106,6 +2106,12 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8
feature_index)
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
+
+ /* init the hardware command queue */
+ data->wq = create_singlethread_workqueue("hidpp-ff-sendqueue");
+ if (!data->wq)
+ return -ENOMEM;
+
data->effect_ids = kcalloc(num_slots, sizeof(int), GFP_KERNEL);
if (!data->effect_ids) {
kfree(data);
@@ -2154,8 +2160,6 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8
feature_index)
data->gain = error ? 0xffff :
get_unaligned_be16(&response.fap.params[0]);
/* 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
