From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 11/33] drm/omap: use dma_mapping_error in omap_gem_attach_pages
Date: Thu, 25 Feb 2016 17:39:35 +0200 [thread overview]
Message-ID: <56CF2037.1090008@ti.com> (raw)
In-Reply-To: <7707410.Pkpu1GDU6i@avalon>
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On 24/02/16 00:10, Laurent Pinchart wrote:
> Hi Tomi,
>
> Thank you for the patch.
>
> On Friday 19 February 2016 11:47:46 Tomi Valkeinen wrote:
>> omap_gem_attach_pages() calls dma_map_page() but does not check the
>> possible error with dma_mapping_error(). If DMA-API debugging is
>> enabled, the debug layer will give a warning if dma_mapping_error() has
>> not been used.
>>
>> This patch adds proper error handling to omap_gem_attach_pages().
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> ---
>> drivers/gpu/drm/omapdrm/omap_gem.c | 14 ++++++++++++++
>> 1 file changed, 14 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c
>> b/drivers/gpu/drm/omapdrm/omap_gem.c index 8495a1a4b617..7098190815f1
>> 100644
>> --- a/drivers/gpu/drm/omapdrm/omap_gem.c
>> +++ b/drivers/gpu/drm/omapdrm/omap_gem.c
>> @@ -264,6 +264,18 @@ static int omap_gem_attach_pages(struct drm_gem_object
>> *obj) for (i = 0; i < npages; i++) {
>> addrs[i] = dma_map_page(dev->dev, pages[i],
>> 0, PAGE_SIZE, DMA_BIDIRECTIONAL);
>> +
>> + if (dma_mapping_error(dev->dev, addrs[i])) {
>> + dev_warn(dev->dev, "omap_gem_attach_pages: dma_map_page
> failed\n");
>
> Using dev_warn(dev->dev, "%s: failed to map page\n", __func__); and proper
> line breaks you'll have no trouble complying with the 80 characters per line
> limit :-)
Ok.
>> +
>> + for (i = i - 1; i >= 0; --i) {
>
> Maybe i-- instead of i = i - 1 ?
Hmm I don't know... I do like assignment in the initializer more than
i--. And why i--? Why not --i? =)
>> + dma_unmap_page(dev->dev, addrs[i],
>> + PAGE_SIZE, DMA_BIDIRECTIONAL);
>> + }
>> +
>> + ret = -ENOMEM;
>> + goto free_addrs;
>> + }
>> }
>> } else {
>> addrs = kzalloc(npages * sizeof(*addrs), GFP_KERNEL);
>> @@ -277,6 +289,8 @@ static int omap_gem_attach_pages(struct drm_gem_object
>> *obj) omap_obj->pages = pages;
>>
>> return 0;
>> +free_addrs:
>> + kfree(addrs);
>>
>
> I'd move this blank line before free_addrs.
Yes, that makes it cleaner.
Tomi
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next prev parent reply other threads:[~2016-02-25 15:39 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-19 9:47 [PATCH 00/33] drm/omap: patches for v4.6 Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 01/33] drm/omap: HDMI: change enable/disable to avoid sync-losts Tomi Valkeinen
2016-02-23 10:22 ` Laurent Pinchart
2016-02-23 11:33 ` Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 02/33] HACK: drm/omap: always use blocking DMM fill Tomi Valkeinen
2016-02-23 10:27 ` Laurent Pinchart
2016-02-23 13:09 ` Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 03/33] HACK: drm/omap: fix memory barrier bug in DMM driver Tomi Valkeinen
2016-02-23 21:13 ` Laurent Pinchart
2016-02-24 10:34 ` Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 04/33] drm/omap: add dmm_read() and dmm_write() wrappers Tomi Valkeinen
2016-02-23 21:18 ` Laurent Pinchart
2016-02-19 9:47 ` [PATCH 05/33] drm/omap: partial workaround for DRA7 DMM errata i878 Tomi Valkeinen
2016-02-23 21:57 ` Laurent Pinchart
2016-02-24 9:14 ` Tomi Valkeinen
2017-09-29 12:29 ` Peter Ujfalusi
2016-02-19 9:47 ` [PATCH 06/33] drm/omap: drm_atomic_get_plane_state() may return ERR_PTR Tomi Valkeinen
2016-02-23 22:01 ` Laurent Pinchart
2016-02-19 9:47 ` [PATCH 07/33] drm/omap: tpd12s015: remove platform data support Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 08/33] drm/omap: tpd12s015: gpio descriptor API Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 09/33] drm/omap: tpd12s015: CT_CP_HPD as optional gpio Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 10/33] drm/omap: add define for DISPC_IRQ_WBUNCOMPLETEERROR Tomi Valkeinen
2016-02-23 22:04 ` Laurent Pinchart
2016-02-19 9:47 ` [PATCH 11/33] drm/omap: use dma_mapping_error in omap_gem_attach_pages Tomi Valkeinen
2016-02-23 22:10 ` Laurent Pinchart
2016-02-25 15:39 ` Tomi Valkeinen [this message]
2016-02-26 8:52 ` Laurent Pinchart
2016-02-26 9:07 ` Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 12/33] drm/omap: use dma_mapping_error in omap_gem_dma_sync Tomi Valkeinen
2016-02-23 22:14 ` Laurent Pinchart
2016-02-25 15:45 ` Tomi Valkeinen
2016-02-26 8:54 ` Laurent Pinchart
2016-02-19 9:47 ` [PATCH 13/33] drm/omap: print an error if display enable fails Tomi Valkeinen
2016-02-23 22:17 ` Laurent Pinchart
2016-02-19 9:47 ` [PATCH 14/33] drm/omap: gem: Clean up GEM objects memory flags Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 15/33] drm/omap: gem: Refactor GEM object allocation Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 16/33] drm/omap: gem: Implement dma_buf import Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 17/33] drm/omap: remove support for ext mem & sync Tomi Valkeinen
2016-02-23 22:42 ` Laurent Pinchart
2016-02-24 9:38 ` Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 18/33] drm/omap: increase vblank wait timeout Tomi Valkeinen
2016-02-23 22:43 ` Laurent Pinchart
2016-02-24 9:41 ` Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 19/33] drm/omap: DISPC: support double-pixel mode Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 20/33] drm/omap: support double-pixel Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 21/33] drm/omap: HDMI: support double-pixel pixel clock Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 22/33] drm/omap: HDMI: Fix HSW value Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 23/33] drm/omap: HDMI: fix WP timings for ilace Tomi Valkeinen
2016-02-19 9:47 ` [PATCH 24/33] drm/omap: DISPC: Fix field order for HDMI Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 25/33] drm/omap: HDMI5: Fix FC HSW value Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 26/33] drm/omap: HDMI5: clean up timings copy Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 27/33] drm/omap: HDMI5: Add interlace support Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 28/33] drm/omap: HDMI5: allow interlace Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 29/33] drm/omap: verify that display x-res is divisible by 8 Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 30/33] drm/omap: verify that fb plane pitches are the same Tomi Valkeinen
2016-02-23 23:02 ` Laurent Pinchart
2016-02-25 15:56 ` Tomi Valkeinen
2016-02-26 8:55 ` Laurent Pinchart
2016-02-26 9:12 ` Tomi Valkeinen
2016-02-26 9:27 ` Laurent Pinchart
2016-02-19 9:48 ` [PATCH 31/33] drm/omap: EBUSY status handling in omap_gem_fault() Tomi Valkeinen
2016-02-19 9:48 ` [PATCH 32/33] drm/omap: fix crtc->plane property delegation Tomi Valkeinen
2016-02-23 23:24 ` Laurent Pinchart
2016-02-19 9:48 ` [PATCH 33/33] drm/omap: check if rotation is supported before commit Tomi Valkeinen
2016-02-23 23:30 ` Laurent Pinchart
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