linux-kernel - [PATCH 1/1] block: rsxx: set error code on exception path

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Date:   Thu,  1 Dec 2016 10:53:14 +0800
From:   Pan Bian <bianpan2016@....com>
To:     Joshua Morris <josh.h.morris@...ibm.com>,
        Philip Kelleher <pjk1939@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org, Pan Bian <bianpan2016@....com>
Subject: [PATCH 1/1] block: rsxx: set error code on exception path

Fix bug https://bugzilla.kernel.org/show_bug.cgi?id=188541. In function
rsxx_pci_probe(), variable st takes the return value. Its value should
be negative on failures. However, the value of st is 0 even if the call
to create_singlethread_workqueue() returns a NULL pointer. This patch
fixes the bug by assigning -ENOMEM to st when the call fails.

Signed-off-by: Pan Bian <bianpan2016@....com>
---
 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 34997df..925bc46 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -890,6 +890,7 @@ 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;
 	}
 
-- 
1.9.1