[PATCH] pci: endpoint: fix a potential NULL pointer dereference

[Kangjie Lu]

In case alloc_workqueue, the fix returns -ENOMEM to avoid
potential NULL pointer dereferences.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/pci/endpoint/functions/pci-epf-test.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c 
b/drivers/pci/endpoint/functions/pci-epf-test.c
index 3e86fa3c7da3..dc610eb1543a 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -570,6 +570,10 @@ static int __init pci_epf_test_init(void)
 
        kpcitest_workqueue = alloc_workqueue("kpcitest",
                                             WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
+       if (unlikely(!kpcitest_workqueue)) {
+               pr_err("Failed to allocate the kpcitest work queue\n");
+               return -ENOMEM;
+       }
        ret = pci_epf_register_driver(&test_driver);
        if (ret) {
                pr_err("Failed to register pci epf test driver --> %d\n", ret);
-- 
2.17.1