Commit 68d890a3 authored by Michał Mirosław's avatar Michał Mirosław Committed by Thierry Reding

drm/tegra: Fix NULL deref in debugfs/iova

When IOMMU is off, ->mm_lock is not initialized and ->mm is NULL.
Signed-off-by: default avatarMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 7664b2fa
......@@ -1033,9 +1033,11 @@ static int tegra_debugfs_iova(struct seq_file *s, void *data)
struct tegra_drm *tegra = drm->dev_private;
struct drm_printer p = drm_seq_file_printer(s);
if (tegra->domain) {
mutex_lock(&tegra->mm_lock);
drm_mm_print(&tegra->mm, &p);
mutex_unlock(&tegra->mm_lock);
}
return 0;
}
......
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