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Date: Mon, 13 Mar 2017 06:36:29 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Umesh Patel <Umesh.Patel@wdc.com>
Cc: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>
Subject: Re: blk_init_queue vs blk_alloc_queue
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On Mon, Mar 13, 2017 at 09:14:12AM +0000, Umesh Patel wrote:
> Hello,
> 
> I Would like to know difference between blk_init_queue and blk_alloc_queue API.
> Can anyone explain when to use what ?

The short answer is that you should neither.  The long answer is that
you should send a link to your driver source if you want anyone to help
you.