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linux5.4: add navi dsc20 kernel alloc fix

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q66 2020-08-08 23:41:50 +02:00
parent dc6a73cf2f
commit 9093a5251f
1 changed files with 33 additions and 0 deletions
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srcpkgs/linux5.4/patches/navi_alloc.patch Normal file
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From 2fdd63feb95c6751526068c02f7512fd4bea6956 Mon Sep 17 00:00:00 2001
From: Daniel Kolesa <daniel@octaforge.org>
Date: Sat, 8 Aug 2020 20:05:29 +0200
Subject: [PATCH] dcn20_resource: use GFP_ATOMIC in 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>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index 2719cde..d37ede0 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -3031,7 +3031,7 @@ static bool dcn20_validate_bandwidth_internal(struct dc *dc, struct dc_state *co
int vlevel = 0;
int pipe_split_from[MAX_PIPES];
int pipe_cnt = 0;
- display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
+ display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_ATOMIC);
DC_LOGGER_INIT(dc->ctx->logger);
BW_VAL_TRACE_COUNT();
--
2.28.0