linux-kernel - Re: [PATCH] drm/vmwgfx: fix a warning due to missing dma

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Message-ID: <20190524141011.GA23514@lst.de>
Date:   Fri, 24 May 2019 16:10:11 +0200
From:   "hch@....de" <hch@....de>
To:     Thomas Hellstrom <thellstrom@...are.com>
Cc:     "hch@....de" <hch@....de>, "cai@....pw" <cai@....pw>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "robin.murphy@....com" <robin.murphy@....com>,
        "m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Linux-graphics-maintainer <Linux-graphics-maintainer@...are.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/vmwgfx: fix a warning due to missing dma_parms

On Fri, May 24, 2019 at 11:57:04AM +0000, Thomas Hellstrom wrote:
> It's a PCI device. The struct device * used in dma_map_sg() is the same
> as the &pci_dev->dev handed to the probe() callback. But at probe time,
> the struct device::dma_parms is non-NULL, at least on my system so
> there shouldn't really be a need to kzalloc() it.

Then there is something really odd going on in the OPs setup..