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Message-Id: <20230924131857.1276330-14-sashal@kernel.org>
Date: Sun, 24 Sep 2023 09:18:51 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: David Francis <David.Francis@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>, christian.koenig@....com,
Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch,
Felix.Kuehling@....com, guchun.chen@....com, James.Zhu@....com,
evan.quan@....com, marek.olsak@....com, Graham.Sider@....com,
srinivasan.shanmugam@....com, Lang.Yu@....com,
amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.15 14/18] drm/amdgpu: Handle null atom context in VBIOS info ioctl
From: David Francis <David.Francis@....com>
[ Upstream commit 5e7e82254270c8cf8b107451c5de01cee2f135ae ]
On some APU systems, there is no atom context and so the
atom_context struct is null.
Add a check to the VBIOS_INFO branch of amdgpu_info_ioctl
to handle this case, returning all zeroes.
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: David Francis <David.Francis@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index e8485b1f02ed6..70d49b998ee9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -926,12 +926,17 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
struct atom_context *atom_context;
atom_context = adev->mode_info.atom_context;
- memcpy(vbios_info.name, atom_context->name, sizeof(atom_context->name));
- memcpy(vbios_info.vbios_pn, atom_context->vbios_pn, sizeof(atom_context->vbios_pn));
- vbios_info.version = atom_context->version;
- memcpy(vbios_info.vbios_ver_str, atom_context->vbios_ver_str,
- sizeof(atom_context->vbios_ver_str));
- memcpy(vbios_info.date, atom_context->date, sizeof(atom_context->date));
+ if (atom_context) {
+ memcpy(vbios_info.name, atom_context->name,
+ sizeof(atom_context->name));
+ memcpy(vbios_info.vbios_pn, atom_context->vbios_pn,
+ sizeof(atom_context->vbios_pn));
+ vbios_info.version = atom_context->version;
+ memcpy(vbios_info.vbios_ver_str, atom_context->vbios_ver_str,
+ sizeof(atom_context->vbios_ver_str));
+ memcpy(vbios_info.date, atom_context->date,
+ sizeof(atom_context->date));
+ }
return copy_to_user(out, &vbios_info,
min((size_t)size, sizeof(vbios_info))) ? -EFAULT : 0;
--
2.40.1
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