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| author | Paul Kocialkowski <contact@paulk.fr> | 2017-07-10 21:33:05 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-07-27 16:57:34 +0200 |
| commit | fea20995976f4b2e8968f852a18e280487d42f0d (patch) | |
| tree | af175c1f7eb513ee3e9e626cf19162d6d7561c2f /drivers/gpu/host1x/dev.c | |
| parent | b9670ca20abcdd1587c15f8cf2d39edce5d2f37d (diff) | |
| download | blackbird-op-linux-fea20995976f4b2e8968f852a18e280487d42f0d.tar.gz blackbird-op-linux-fea20995976f4b2e8968f852a18e280487d42f0d.zip | |
gpu: host1x: Free the IOMMU domain when there is no device to attach
When there is no device to attach to the IOMMU domain, as may be the
case when the device-tree does not contain the proper iommu node, it is
best to keep going without IOMMU support rather than failing.
This allows the driver to probe and function instead of taking down
all of the tegra drm driver, leading to missing display support.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Fixes: 404bfb78daf3 ("gpu: host1x: Add IOMMU support")
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170710193305.5987-1-contact@paulk.fr
Diffstat (limited to 'drivers/gpu/host1x/dev.c')
| -rw-r--r-- | drivers/gpu/host1x/dev.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c index 2c58a390123a..778272514164 100644 --- a/drivers/gpu/host1x/dev.c +++ b/drivers/gpu/host1x/dev.c @@ -186,8 +186,13 @@ static int host1x_probe(struct platform_device *pdev) return -ENOMEM; err = iommu_attach_device(host->domain, &pdev->dev); - if (err) + if (err == -ENODEV) { + iommu_domain_free(host->domain); + host->domain = NULL; + goto skip_iommu; + } else if (err) { goto fail_free_domain; + } geometry = &host->domain->geometry; @@ -198,6 +203,7 @@ static int host1x_probe(struct platform_device *pdev) host->iova_end = geometry->aperture_end; } +skip_iommu: err = host1x_channel_list_init(&host->channel_list, host->info->nb_channels); if (err) { |
