linux-kernel - [PATCH v1] scsi: dc395: fix error case unwinding

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Message-Id: <20210907040702.1846409-1-ztong0001@gmail.com>
Date:   Mon,  6 Sep 2021 21:07:02 -0700
From:   Tong Zhang <ztong0001@...il.com>
To:     Oliver Neukum <oliver@...kum.org>, Ali Akcaagac <aliakc@....de>,
        Jamie Lenehan <lenehan@...bble.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        dc395x@...bble.org, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Tong Zhang <ztong0001@...il.com>
Subject: [PATCH v1] scsi: dc395: fix error case unwinding

dc395x_init_one()->adapter_init() might fail. In this case, the acb
is already clean up by adapter_init(), no need to do that in
adapter_uninit(acb) again.

[    1.252251] dc395x: adapter init failed
[    1.254900] RIP: 0010:adapter_uninit+0x94/0x170 [dc395x]
[    1.260307] Call Trace:
[    1.260442]  dc395x_init_one.cold+0x72a/0x9bb [dc395x]

Signed-off-by: Tong Zhang <ztong0001@...il.com>
---
 drivers/scsi/dc395x.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c
index 24c7cefb0b78..1c79e6c27163 100644
--- a/drivers/scsi/dc395x.c
+++ b/drivers/scsi/dc395x.c
@@ -4618,6 +4618,7 @@ static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 	/* initialise the adapter and everything we need */
  	if (adapter_init(acb, io_port_base, io_port_len, irq)) {
 		dprintkl(KERN_INFO, "adapter init failed\n");
+		acb = NULL;
 		goto fail;
 	}
 
-- 
2.25.1