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fbdev: omapfb: panel-dsi-cm: initialize lock before registering display

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dsicm_probe() registers the display before initializing ddata->lock.
Once omapdss_register_display() publishes the display, another consumer
can reach a dsicm callback that takes this mutex while it is still
uninitialized.

Initialize the mutex before registering the display so the published
callbacks always see a valid lock.

Fixes: f76ee892a9 ("omapfb: copy omapdss & displays for omapfb")
Cc: stable@vger.kernel.org
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Runyu Xiao 2026-08-18 21:53:18 +08:00 committed by Helge Deller
parent f74cf70e5e
commit f8e43fe0f2
1 changed files with 2 additions and 2 deletions
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4
drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c
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@ -1150,14 +1150,14 @@ static int dsicm_probe(struct platform_device *pdev)
dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
mutex_init(&ddata->lock);
r = omapdss_register_display(dssdev);
if (r) {
dev_err(dev, "Failed to register panel\n");
goto err_reg;
}
mutex_init(&ddata->lock);
atomic_set(&ddata->do_update, 0);
ddata->reset_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);