When create_singlethread_workqueue returns NULL to card->event_wq, no
error return code of rsxx_pci_probe() is assigned.

To fix this bug, st is assigned with -ENOMEM in this case.

Fixes: 8722ff8cdbfa ("block: IBM RamSan 70/80 device driver")
Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
v2:
* Drop wrong parts that make no sense.
  Thank Jens Axboe for good advice.

---
 drivers/block/rsxx/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 63f549889f87..d7e2416112ec 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -869,6 +869,7 @@ static int rsxx_pci_probe(struct pci_dev *dev,
        card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event");
        if (!card->event_wq) {
                dev_err(CARD_TO_DEV(card), "Failed card event setup.\n");
+               st = -ENOMEM;
                goto failed_event_handler;
        }
 
-- 
2.17.1

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