linux-kernel - Re: [PATCH 1/1] [virt] virtio-blk: Use ida to allocate disk index

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Date:	Thu, 2 Jun 2011 13:34:06 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Mark Wu <dwu@...hat.com>
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] [virt] virtio-blk: Use ida to allocate disk index

On Wed, Jun 01, 2011 at 04:25:48AM -0400, Mark Wu wrote:
> On 06/01/2011 03:24 AM, Mark Wu wrote:
> >-	if (index_to_minor(index)>= 1<<  MINORBITS)
> >-		return -ENOSPC;
> >+	do {
> >+		if (!ida_pre_get(&vd_index_ida, GFP_KERNEL))
> >+			return err;
> >+
> There's a problem in above code: err is not initialized before
> using, so change it to return -1;
> +       do {
> +               if (!ida_pre_get(&vd_index_ida, GFP_KERNEL))
> +                       return -1;

Not -1. Pls return -ENOMEM.

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