diff options
| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2016-12-21 11:00:12 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-21 09:21:19 +0100 |
| commit | 7878dca7ca24f7186cbf2e4635ad74fee0d2ce7f (patch) | |
| tree | c87fa4391881ed674b17f00a88621537a4adbf35 | |
| parent | b9ea0af4793b4fce9be0f07dd0cf9ea7c94c1049 (diff) | |
drm/sti: sti_vtg: Handle return NULL error from devm_ioremap_nocache
[ Upstream commit 1ae0d5af347df224a6e76334683f13a96d915a44 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 d56630c60039..117a2f52fb4e 100644 --- a/drivers/gpu/drm/sti/sti_vtg.c +++ b/drivers/gpu/drm/sti/sti_vtg.c @@ -346,6 +346,10 @@ 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) { |