linux-kernel - Re: [PATCH 6/6] g_NCR5380: Fix release region in error handling

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Date:   Wed, 2 Nov 2016 18:49:02 +1100 (AEDT)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Ondrej Zary <linux@...nbow-software.org>
cc:     Christoph Hellwig <hch@...radead.org>, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] g_NCR5380: Fix release region in error handling


On Mon, 31 Oct 2016, Ondrej Zary wrote:

> When a SW-configurable card is specified but not found, the driver
> releases wrong region, causing the following message in kernel log:
> Trying to free nonexistent resource <0000000000000000-000000000000000f>
> 
> Fix it by assigning base earlier.
> 
> Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

This fix is not related to the others in this series. It could go at the 
beginning where it is easy to cherry-pick.

Fixes: a8cfbcaec0c1 ("scsi: g_NCR5380: Stop using scsi_module.c")
Acked-by: Finn Thain <fthain@...egraphics.com.au>

> ---
>  drivers/scsi/g_NCR5380.c |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
> index 6a08d3e..d33e71f 100644
> --- a/drivers/scsi/g_NCR5380.c
> +++ b/drivers/scsi/g_NCR5380.c
> @@ -258,12 +258,12 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
>  		if (ports[i]) {
>  			/* At this point we have our region reserved */
>  			magic_configure(i, 0, magic); /* no IRQ yet */
> -			outb(0xc0, ports[i] + 9);
> -			if (inb(ports[i] + 9) != 0x80) {
> +			base = ports[i];
> +			outb(0xc0, base + 9);
> +			if (inb(base + 9) != 0x80) {
>  				ret = -ENODEV;
>  				goto out_release;
>  			}
> -			base = ports[i];
>  			port_idx = i;
>  		} else
>  			return -EINVAL;
> 

--