On Thu, Mar 15, 2018 at 10:10 AM, <mikita.lipski at amd.com> wrote:
> From: Mikita Lipski <mikita.lipski at amd.com>
>
> 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 at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index b4911911..593396f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -1456,6 +1456,9 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
> }
> }
>
> + /* disable all interrupts */
> + amdgpu_irq_disable_all(adev);
> +
Any reason not to move this to the top of this function before the SMC loop?
Alex
> for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
> if (!adev->ip_blocks[i].status.hw)
> continue;
> @@ -1482,8 +1485,6 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
> adev->ip_blocks[i].status.hw = false;
> }
>
> - /* 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)
> --
> 2.7.4
>
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