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Subject[PATCH] hid: logitech: check the return value of create_singlethread_workqueue
Date
create_singlethread_workqueue may fail and return NULL. The fix
checks if it is NULL to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
drivers/hid/hid-logitech-hidpp.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 15ed6177a7a3..efbc39b92aa2 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2156,6 +2156,9 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)

/* init the hardware command queue */
data->wq = create_singlethread_workqueue("hidpp-ff-sendqueue");
+ if (!data->wq)
+ return -ENOMEM;
+
atomic_set(&data->workqueue_size, 0);

/* initialize with zero autocenter to get wheel in usable state */
--
2.17.1
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