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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2022-05-02 16:25:13 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-05-05 09:18:32 +0200 |
| commit | f870231fdd6ce2c6c040a3584a2eac97ae473780 (patch) | |
| tree | b84e31c9b73da87b6e8376913fae8ffb08d55b57 /drivers/gpu/drm/mgag200/mgag200_drv.c | |
| parent | e13f13e039dc8f31168b5569120a7658035c80ee (diff) | |
| download | linux-stable-f870231fdd6ce2c6c040a3584a2eac97ae473780.tar.gz linux-stable-f870231fdd6ce2c6c040a3584a2eac97ae473780.tar.bz2 linux-stable-f870231fdd6ce2c6c040a3584a2eac97ae473780.zip | |
drm/ast: Protect concurrent access to I/O registers with lock
Add a mutex lock to protect concurrent access to I/O registers
against each other. This happens between invocation of commit-
tail functions and get-mode operations. Both with use the CRTC
index register AST_IO_CRTC_PORT. Concurrent access can lead to
failed mode-setting operations.
v2:
* fix typo in commit description (Jocelyn)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reported-by: KuoHsiang Chou <kuohsiang_chou@aspeedtech.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220502142514.2174-3-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_drv.c')
0 files changed, 0 insertions, 0 deletions