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drm/amdgpu/display: use GFP_ATOMIC in dcn20_validate_bandwidth_internal

GFP_KERNEL may and will sleep, and this is being executed in
a non-preemptible context; this will mess things up since it's
called inbetween DC_FP_START/END, and rescheduling will result
in the DC_FP_END later being called in a different context (or
just crashing if any floating point/vector registers/instructions
are used after the call is resumed in a different context).

Signed-off-by: Daniel Kolesa <daniel@octaforge.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

authored by

Daniel Kolesa and committed by
Alex Deucher fbd7cda0 8db2d634

+1 -1
+1 -1
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
··· 3141 3141 int vlevel = 0; 3142 3142 int pipe_split_from[MAX_PIPES]; 3143 3143 int pipe_cnt = 0; 3144 - display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_KERNEL); 3144 + display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_ATOMIC); 3145 3145 DC_LOGGER_INIT(dc->ctx->logger); 3146 3146 3147 3147 BW_VAL_TRACE_COUNT();