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

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Message-ID: <a68837f4-1ff7-76d5-7a68-80d2c0dbd95e@linux-m68k.org>
Date:   Tue, 21 Sep 2021 09:56:29 +1000 (AEST)
From:   Finn Thain <fthain@...ux-m68k.org>
To:     Tong Zhang <ztong0001@...il.com>
cc:     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
Subject: Re: [PATCH v1] scsi: dc395: fix error case unwinding


On Mon, 6 Sep 2021, Tong Zhang wrote:

> 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>

Reviewed-by: Finn Thain <fthain@...ux-m68k.org>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")

> ---
>  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;
>  	}
>  
>