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author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2016-12-21 11:00:12 +0530 |
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committer | Vincent Abriou <vincent.abriou@st.com> | 2017-01-06 15:12:03 +0100 |
commit | 1ae0d5af347df224a6e76334683f13a96d915a44 (patch) | |
tree | 01a29e9f8673a6341a2bb8072872295c6c953e1e /drivers/gpu/drm/sti | |
parent | 6d10c54a83e214348a2f4d59b103047dc230343c (diff) | |
download | op-kernel-dev-1ae0d5af347df224a6e76334683f13a96d915a44.zip op-kernel-dev-1ae0d5af347df224a6e76334683f13a96d915a44.tar.gz |
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 a8882bd..c3d9c8a 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) { |