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drm/ttm: fix error handling if no BO can be swapped out v4 

In case that all pre-allocated BOs are busy, just continue to populate
BOs since likely half of system memory in total is still free.

v4 (chk): fix code moved to VMWGFX as well

Signed-off-by: Shiwu Zhang <shiwu.zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210422115757.3946-1-christian.koenig@amd.com
This commit is contained in:
Shiwu Zhang 2021-04-22 16:37:49 +08:00 committed by Christian König
parent a4394b6d0a
commit 2a269ba888
3 changed files with 4 additions and 2 deletions
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2
drivers/gpu/drm/ttm/ttm_device.c
View File

@ -112,7 +112,7 @@ int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags)
{
struct ttm_global *glob = &ttm_glob;
struct ttm_device *bdev;
int ret = -EBUSY;
int ret = 0;
mutex_lock(&ttm_global_mutex);
list_for_each_entry(bdev, &glob->device_list, device_list) {

2
drivers/gpu/drm/ttm/ttm_tt.c
View File

@ -329,6 +329,8 @@ int ttm_tt_populate(struct ttm_device *bdev,
ttm_dma32_pages_limit) {
ret = ttm_global_swapout(ctx, GFP_KERNEL);
if (ret == 0)
break;
if (ret < 0)
goto error;
}

2
drivers/gpu/drm/vmwgfx/ttm_memory.c
View File

@ -280,7 +280,7 @@ static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq,
spin_unlock(&glob->lock);
ret = ttm_global_swapout(ctx, GFP_KERNEL);
spin_lock(&glob->lock);
if (unlikely(ret < 0))
if (unlikely(ret <= 0))
break;
}