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output/kms: Don't attemp to add common modes on connectors without modes

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We have no way to sanely add safe modes if there are no modes we can
compare with, thus don't try.

Fixes the following crash:

 #0 are_all_modes_equally_sized at ../src/backends/native/meta-output-kms.c:284
 #1 maybe_add_fallback_modes at ../src/backends/native/meta-output-kms.c:310
 #2 init_output_modes at ../src/backends/native/meta-output-kms.c:347
 #3 meta_output_kms_new at ../src/backends/native/meta-output-kms.c:414
 #4 init_outputs at ../src/backends/native/meta-gpu-kms.c:332
 #5 meta_gpu_kms_read_current at ../src/backends/native/meta-gpu-kms.c:368
 #6 meta_gpu_kms_new at ../src/backends/native/meta-gpu-kms.c:403
 #7 create_gpu_from_udev_device at ../src/backends/native/meta-backend-native.c:461
 #8 init_gpus at ../src/backends/native/meta-backend-native.c:551
 #9 meta_backend_native_initable_init at ../src/backends/native/meta-backend-native.c:632

Fixes: 877cc3eb7d44e2886395151f763ec09bea350444
Related: https://bugzilla.redhat.com/show_bug.cgi?id=2127801
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2646>
This commit is contained in:
Jonas Ådahl 2022-09-29 14:23:55 +02:00 committed by Marge Bot
parent 88504b96d0
commit 2c8adb1966
1 changed files with 3 additions and 0 deletions
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3
src/backends/native/meta-output-kms.c
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@ -342,6 +342,9 @@ maybe_add_fallback_modes (const MetaKmsConnectorState *connector_state,
MetaGpuKms *gpu_kms,
MetaKmsConnector *kms_connector)
{
if (!connector_state->modes)
return;
if (!connector_state->has_scaling)
return;