linux-kernel - Re: [PATCH next] xen: pcifront: Process failure for pcifront_(re)scan

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20141106041648.GM6168@google.com>
Date:	Wed, 5 Nov 2014 21:16:48 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Chen Gang <gang.chen.5i5j@...il.com>
Cc:	konrad.wilk@...cle.com, boris.ostrovsky@...cle.com,
	david.vrabel@...rix.com, xen-devel@...ts.xenproject.org,
	linux-pci@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH next] xen: pcifront: Process failure for
 pcifront_(re)scan_root()

On Mon, Oct 06, 2014 at 11:04:45AM +0800, Chen Gang wrote:
> When pcifront_rescan_root() or pcifront_scan_root() fails, need return
> error code, neither set XenbusStateConnected state, just like the other
> areas have done.
> 
> For pcifront_rescan_root(), it will return error code ("num_roots = 0;",
> skip xenbus_switch_state return value).
> 
> For pcifront_scan_root(), it will return 0 ("num_roots = 0;", set 0 by
> the return value of xenbus_switch_state, which always return 0, at
> present).
> 
> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>

Applied to pci/virtualization for v3.19, with Konrad's ack and my changelog
rework.  Thanks!

> ---
>  drivers/pci/xen-pcifront.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
> index 53df39a..d78d884 100644
> --- a/drivers/pci/xen-pcifront.c
> +++ b/drivers/pci/xen-pcifront.c
> @@ -866,6 +866,11 @@ static int pcifront_try_connect(struct pcifront_device *pdev)
>  		xenbus_dev_error(pdev->xdev, err,
>  				 "No PCI Roots found, trying 0000:00");
>  		err = pcifront_scan_root(pdev, 0, 0);
> +		if (err) {
> +			xenbus_dev_fatal(pdev->xdev, err,
> +					 "Error scanning PCI root 0000:00");
> +			goto out;
> +		}
>  		num_roots = 0;
>  	} else if (err != 1) {
>  		if (err == 0)
> @@ -947,6 +952,11 @@ static int pcifront_attach_devices(struct pcifront_device *pdev)
>  		xenbus_dev_error(pdev->xdev, err,
>  				 "No PCI Roots found, trying 0000:00");
>  		err = pcifront_rescan_root(pdev, 0, 0);
> +		if (err) {
> +			xenbus_dev_fatal(pdev->xdev, err,
> +					 "Error scanning PCI root 0000:00");
> +			goto out;
> +		}
>  		num_roots = 0;
>  	} else if (err != 1) {
>  		if (err == 0)
> -- 
> 1.9.3
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/