drm/radeon/kms: prevent parallel AtomBIOS calls

This just adds a mutex around the atombios table execution
so we don't call it from two contexts at once.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/atom.h b/drivers/gpu/drm/radeon/atom.h
index 6671848e5ea1..47fd943f6d14 100644
--- a/drivers/gpu/drm/radeon/atom.h
+++ b/drivers/gpu/drm/radeon/atom.h
@@ -120,6 +120,7 @@ struct card_info {
 
 struct atom_context {
         struct card_info *card;
+        struct mutex mutex;
         void *bios;
         uint32_t cmd_table, data_table;
         uint16_t *iio;