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| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2016-12-21 06:30:12 +0100 |
|---|---|---|
| committer | Vincent Abriou <vincent.abriou@st.com> | 2017-01-06 15:12:03 +0100 |
| commit | 1ae0d5af347df224a6e76334683f13a96d915a44 (patch) | |
| tree | 01a29e9f8673a6341a2bb8072872295c6c953e1e /drivers/gpu/drm/sti | |
| parent | drm/sti: remove deprecated sti_vtac.c file (diff) | |
| download | linux-1ae0d5af347df224a6e76334683f13a96d915a44.tar.xz linux-1ae0d5af347df224a6e76334683f13a96d915a44.zip | |
drm/sti: sti_vtg: Handle return NULL error from devm_ioremap_nocache
Here, If devm_ioremap_nocache will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference. This error check
will avoid NULL pointer dereference.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Vincent Abriou <vincent.abriou@st.com>
Diffstat (limited to 'drivers/gpu/drm/sti')
| -rw-r--r-- | drivers/gpu/drm/sti/sti_vtg.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_vtg.c b/drivers/gpu/drm/sti/sti_vtg.c index a8882bdd0f8b..c3d9c8ae14af 100644 --- a/drivers/gpu/drm/sti/sti_vtg.c +++ b/drivers/gpu/drm/sti/sti_vtg.c @@ -429,6 +429,10 @@ static int vtg_probe(struct platform_device *pdev) return -ENOMEM; } vtg->regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); + if (!vtg->regs) { + DRM_ERROR("failed to remap I/O memory\n"); + return -ENOMEM; + } np = of_parse_phandle(pdev->dev.of_node, "st,slave", 0); if (np) { |