[PATCH 3.10 09/24] drm/nouveau/gem: return only valid domain when theres only one

From: Greg Kroah-Hartman
Date: Fri Nov 06 2015 - 14:43:04 EST

3.10-stable review patch. If anyone has any objections, please let me know.


From: Ilia Mirkin <imirkin@xxxxxxxxxxxx>

commit 2a6c521bb41ce862e43db46f52e7681d33e8d771 upstream.

On nv50+, we restrict the valid domains to just the one where the buffer
was originally created. However after the buffer is evicted to system
memory, we might move it back to a different domain that was not
originally valid. When sharing the buffer and retrieving its GEM_INFO
data, we still want the domain that will be valid for this buffer in a
pushbuf, not the one where it currently happens to be.

This resolves fdo#92504 and several others. These are due to suspend
evicting all buffers, making it more likely that they temporarily end up
in the wrong place.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92504
Signed-off-by: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/gpu/drm/nouveau/nouveau_gem.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -177,11 +177,12 @@ nouveau_gem_info(struct drm_file *file_p
struct nouveau_bo *nvbo = nouveau_gem_object(gem);
struct nouveau_vma *vma;

- if (nvbo->bo.mem.mem_type == TTM_PL_TT)
+ if (is_power_of_2(nvbo->valid_domains))
+ rep->domain = nvbo->valid_domains;
+ else if (nvbo->bo.mem.mem_type == TTM_PL_TT)
rep->offset = nvbo->bo.offset;
if (cli->base.vm) {
vma = nouveau_bo_vma_find(nvbo, cli->base.vm);

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