linux-kernel - Re: [PATCH] IB/mlx5: Convert to use vm_map_pages

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Message-ID: <20190825194354.GC21239@ziepe.ca>
Date:   Sun, 25 Aug 2019 16:43:54 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Souptick Joarder <jrdr.linux@...il.com>
Cc:     leon@...nel.org, dledford@...hat.com, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org, willy@...radead.org
Subject: Re: [PATCH] IB/mlx5: Convert to use vm_map_pages_zero()

On Sun, Aug 25, 2019 at 11:37:27AM +0530, Souptick Joarder wrote:
> First, length passed to mmap is checked explicitly against
> PAGE_SIZE.
> 
> Second, if vma->vm_pgoff is passed as non zero, it would return
> error. It appears like driver is expecting vma->vm_pgoff to
> be passed as 0 always.

? pg_off is not zero

Jason