linux-kernel - Re: [PATCH] dma-buf: Fix a warning message in dma_heap_buffer

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Date:   Wed, 30 Oct 2019 09:17:14 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Sumit Semwal <sumit.semwal@...aro.org>,
        "Andrew F. Davis" <afd@...com>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Liam Mark <lmark@...eaurora.org>,
        Laura Abbott <labbott@...hat.com>,
        Brian Starkey <Brian.Starkey@....com>,
        linux-media@...r.kernel.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@...ts.linaro.org>,
        lkml <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] dma-buf: Fix a warning message in dma_heap_buffer_destroy()

On Tue, Oct 29, 2019 at 11:31 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> The first argument of WARN() is a condition so this will just print the
> function name instead of the whole warning message.
>
> Fixes: 7b87ea704fd9 ("dma-buf: heaps: Add heap helpers")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
>  drivers/dma-buf/heaps/heap-helpers.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/dma-buf/heaps/heap-helpers.c b/drivers/dma-buf/heaps/heap-helpers.c
> index 750bef4e902d..a31684c0d5b2 100644
> --- a/drivers/dma-buf/heaps/heap-helpers.c
> +++ b/drivers/dma-buf/heaps/heap-helpers.c
> @@ -52,7 +52,7 @@ static void *dma_heap_map_kernel(struct heap_helper_buffer *buffer)
>  static void dma_heap_buffer_destroy(struct heap_helper_buffer *buffer)
>  {
>         if (buffer->vmap_cnt > 0) {
> -               WARN("%s: buffer still mapped in the kernel\n", __func__);
> +               WARN(1, "%s: buffer still mapped in the kernel\n", __func__);
>                 vunmap(buffer->vaddr);
>         }

Thanks for catching and reporting this!

Acked-by: John Stultz <john.stultz@...aro.org>

Sumit, do you mind picking this up for drm-misc-next?

thanks
-john