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>
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@ -429,6 +429,10 @@ static int vtg_probe(struct platform_device *pdev)
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return -ENOMEM;
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}
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vtg->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
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if (!vtg->regs) {
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DRM_ERROR("failed to remap I/O memory\n");
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return -ENOMEM;
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}
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np = of_parse_phandle(pdev->dev.of_node, "st,slave", 0);
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if (np) {
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