drm/amdgpu: protect XCP scheduler selection

amdgpu_xcp_select_scheds() reads the per-XCP scheduler list.
Partition switching rebuilds the same table under xcp_lock.

Take xcp_lock around XCP scheduler selection and release.
This prevents readers from observing partially rebuilt state.

Also revalidate the selected XCP id before indexing the table.
An open file can outlive a switch to another partition mode.

Signed-off-by: Xiang Liu <xiang.liu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions