linux-kernel - Re: [PATCH] libata: fix using DMA buffers on stack

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Message-ID: <CAHG4imPE3pNXAd5WvF-7hLyyZfpgAcT7KkVoCa+0iTGbHxxbvA@mail.gmail.com>
Date:   Thu, 28 Mar 2019 12:00:15 +0000
From:   raymond pang <raymondpangxd@...il.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [PATCH] libata: fix using DMA buffers on stack

hi Jens,

Thanks for review. I'll fix them up.

Best regards,
Raymond

On Tue, Mar 26, 2019 at 2:09 PM Jens Axboe <axboe@...nel.dk> wrote:
>
> On 3/25/19 9:07 PM, raymond pang wrote:
> > When CONFIG_VMAP_STACK=y, __pa() returns incorrect physical address for
> > a stack virtual address. Stack DMA buffers must be avoided.
>
> The patch looks fine, but it's white space mangled so it won't apply.
> Additionally, you don't need to use kzfree, just use kfree.
>
> --
> Jens Axboe
>