linux-kernel - [PATCH 5.9 287/757] drm/msm: Fix the a650 hw

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201027135504.032177121@linuxfoundation.org>
Date:   Tue, 27 Oct 2020 14:48:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jonathan Marek <jonathan@...ek.ca>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Rob Clark <robdclark@...omium.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.9 287/757] drm/msm: Fix the a650 hw_apriv check

From: Jordan Crouse <jcrouse@...eaurora.org>

[ Upstream commit e9ba8d550dd1e28870a0bdc7c11af026c2a94702 ]

Commit 604234f33658 ("drm/msm: Enable expanded apriv support for a650")
was checking the result of adreno_is_a650() before the gpu revision
got probed in adreno_gpu_init() so it was always coming across as
false. Snoop into the revision ID ahead of time to correctly set the
hw_apriv flag so that it can be used by msm_gpu to properly setup
global buffers.

Fixes: 604234f33658 ("drm/msm: Enable expanded apriv support for a650")
Reported-by: Jonathan Marek <jonathan@...ek.ca>
Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
Tested-by: Jonathan Marek <jonathan@...ek.ca>
Signed-off-by: Rob Clark <robdclark@...omium.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 66a95e22b7b3d..456d729c81c39 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1048,6 +1048,8 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 {
 	struct msm_drm_private *priv = dev->dev_private;
 	struct platform_device *pdev = priv->gpu_pdev;
+	struct adreno_platform_config *config = pdev->dev.platform_data;
+	const struct adreno_info *info;
 	struct device_node *node;
 	struct a6xx_gpu *a6xx_gpu;
 	struct adreno_gpu *adreno_gpu;
@@ -1064,7 +1066,14 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	adreno_gpu->registers = NULL;
 	adreno_gpu->reg_offsets = a6xx_register_offsets;
 
-	if (adreno_is_a650(adreno_gpu))
+	/*
+	 * We need to know the platform type before calling into adreno_gpu_init
+	 * so that the hw_apriv flag can be correctly set. Snoop into the info
+	 * and grab the revision number
+	 */
+	info = adreno_info(config->rev);
+
+	if (info && info->revn == 650)
 		adreno_gpu->base.hw_apriv = true;
 
 	ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1);
-- 
2.25.1