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From 47c6044a203e7ab52ef61f4c534593e8ba7d1572 Mon Sep 17 00:00:00 2001
From: Mikita Lipski <mikita.lipski@amd.com>
Date: Thu, 15 Mar 2018 09:37:08 -0400
Subject: [PATCH 3826/4131] drm/amdgpu: Disable irq on device before destroying
it
Disable irq on devices before destroying them. That prevents
use-after-free memory access when unloading the driver.
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 023be4b..dc71a0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1507,6 +1507,9 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
int i, r;
amdgpu_amdkfd_device_fini(adev);
+ /* disable all interrupts */
+ amdgpu_irq_disable_all(adev);
+
/* need to disable SMC first */
for (i = 0; i < adev->num_ip_blocks; i++) {
if (!adev->ip_blocks[i].status.hw)
@@ -1558,12 +1561,6 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
adev->ip_blocks[i].status.hw = false;
}
- if (adev->firmware.load_type == AMDGPU_FW_LOAD_SMU)
- amdgpu_ucode_fini_bo(adev);
-
- /* disable all interrupts */
- amdgpu_irq_disable_all(adev);
-
for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
if (!adev->ip_blocks[i].status.sw)
continue;
--
2.7.4
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