linux-kernel - [PATCH v2] block: rsxx: fix error return code of rsxx_pci

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Message-Id: <20210310033017.4023-1-baijiaju1990@gmail.com>
Date:   Tue,  9 Mar 2021 19:30:17 -0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     josh.h.morris@...ibm.com, pjk1939@...ux.ibm.com, axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH v2] block: rsxx: fix error return code of rsxx_pci_probe()

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 <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.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