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| 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 09:01:05 +0100 |
| commit | 7d881e89d38cdd4de8d9d5e55082a11650cd9a10 (patch) | |
| tree | f907c0774d701a89c2dd531510ccf046acd980a8 /drivers | |
| parent | 45dce99ab8167986a98bb15ae8fdce73ff41b612 (diff) | |
| download | linux-stable-7d881e89d38cdd4de8d9d5e55082a11650cd9a10.tar.gz linux-stable-7d881e89d38cdd4de8d9d5e55082a11650cd9a10.tar.bz2 linux-stable-7d881e89d38cdd4de8d9d5e55082a11650cd9a10.zip | |
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>
Diffstat (limited to 'drivers')
| -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 740d6e347a62..b0fc11ec6ab7 100644 --- a/drivers/gpu/drm/sti/sti_vtg.c +++ b/drivers/gpu/drm/sti/sti_vtg.c @@ -303,6 +303,10 @@ 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) { |