On Mon, 16 Aug 2021 16:30:46 +0200 lnx7586@gregdf.com wrote:

From: Greg Depoire--Ferrer lnx7586@gregdf.com

Commit 69de4421bb4c ("drm/ttm: Initialize debugfs from ttm_global_init()") unintentionally made ttm_global_init() return early with an error when debugfs_create_file() fails. When CONFIG_DEBUG_FS is disabled, debugfs_create_file() returns a ENODEV error so the TTM device would fail to initialize.

Instead of returning early with the error, print it and continue. ENODEV can be ignored because it just means that CONFIG_DEBUG_FS is disabled.

Fixes: 69de4421bb4c ("drm/ttm: Initialize debugfs from ttm_global_init()") Reported-by: Mikael Pettersson mikpelinux@gmail.com Reported-by: Duncan j.duncan@cox.net Signed-off-by: Greg Depoire--Ferrer lnx7586@gregdf.com

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Hi, I had this bug as well with the nouveau driver after updating. This patch fixes it for me.

drivers/gpu/drm/ttm/ttm_device.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)

This fixes the problem here, too. Running it now.

Tested-by: Duncan j.duncan@cox.net