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OMAP: DSS2: Don't allow moving managers away from enabled displays 

If a manager is moved while attached to an enabled display, the DSS
system will be left in an inconsistent state. This will eventually cause
a kernel oops when the enabled display is disabled.

Fix this by not allowing the user to move a manager away from an enabled
display.

Signed-off-by: Daniel Morsing <daniel.morsing@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Daniel Morsing 2011-08-03 22:10:51 +02:00 committed by Tomi Valkeinen
parent 05e1d60607
commit 0f770b4765
1 changed files with 7 additions and 0 deletions
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7
drivers/video/omap2/dss/manager.c
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@ -586,6 +586,13 @@ static int omap_dss_unset_device(struct omap_overlay_manager *mgr)
return -EINVAL;
}
/*
* Don't allow currently enabled displays to have the overlay manager
* pulled out from underneath them
*/
if (mgr->device->state != OMAP_DSS_DISPLAY_DISABLED)
return -EINVAL;
mgr->device->manager = NULL;
mgr->device = NULL;
mgr->device_changed = true;