From: Dmitry Osipenko Date: Wed, 14 Jun 2017 23:18:25 +0000 (+0300) Subject: drm/tegra: Correct idr_alloc() minimum id X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d6c153ec85856f5ad29adc20739ec28edeb7c042;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/tegra: Correct idr_alloc() minimum id The client ID 0 is reserved by the host1x/cdma to mark the timeout timer work as already been scheduled and context ID is used as the clients one. This fixes spurious CDMA timeouts. Fixes: bdd2f9cd10eb ("drm/tegra: Don't leak kernel pointer to userspace") Signed-off-by: Dmitry Osipenko Reviewed-by: Mikko Perttunen Signed-off-by: Thierry Reding Link: http://patchwork.freedesktop.org/patch/msgid/9c19a44219acd988e678cf9abe21363911184625.1497480754.git.digetx@gmail.com --- diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index fefa715c4315..81f86a67c10d 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -539,7 +539,7 @@ static int tegra_client_open(struct tegra_drm_file *fpriv, if (err < 0) return err; - err = idr_alloc(&fpriv->contexts, context, 0, 0, GFP_KERNEL); + err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL); if (err < 0) { client->ops->close_channel(context); return err;