drm/tegra: replace idr_init() by idr_init_base()

[ Upstream commit 41f71629b4c432f8dd47d70ace813be5f79d4d75 ]

idr_init() uses base 0 which is an invalid identifier for this driver.
The new function idr_init_base allows IDR to set the ID lookup from
base 1. This avoids all lookups that otherwise starts from 0 since
0 is always unused.

References: commit 6ce711f27500 ("idr: Make 1-based IDRs more efficient")

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index a2bd5876c633515950f23be6cdff6f0f49306312..00808a3d67832507955494f9e81bc57f9a7f8198 100644 (file)
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -242,7 +242,7 @@ static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
        if (!fpriv)
                return -ENOMEM;
 
-       idr_init(&fpriv->contexts);
+       idr_init_base(&fpriv->contexts, 1);
        mutex_init(&fpriv->lock);
        filp->driver_priv = fpriv;