drm/tegra: Fix comparison operator for buffer size

[ Upstream commit 5265f0338bc0feec6c0d544dfe005dec1a93cb93 ]

Here we are checking for the buffer length, not an offset for writing
to, so using > is correct. The current code incorrectly rejects a
command buffer ending at the memory buffer's end.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 0598b4c18c253bb9f10076174a0b6c2774a86e87..75b1c8c03ce95eff8e9f824c1a161a70ffced508 100644 (file)
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -470,7 +470,7 @@ int tegra_drm_submit(struct tegra_drm_context *context,
                 * unaligned offset is malformed and cause commands stream
                 * corruption on the buffer address relocation.
                 */
-               if (offset & 3 || offset >= obj->gem.size) {
+               if (offset & 3 || offset > obj->gem.size) {
                        err = -EINVAL;
                        goto fail;
                }