From: Andreas Heider Date: Sun, 20 May 2012 23:14:50 +0000 (+0100) Subject: drm/nouveau: Check dsm on switcheroo unregister X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2f3787aa439ae0d34e4658400c1139a7541bec1d;p=linux-beck.git drm/nouveau: Check dsm on switcheroo unregister Currently vga_switcheroo_unregister_handler is called unconditionally when nouveau is unloaded, even when nouveau never registered a handler. This interferes with other switcheroo handlers, as vga_switcheroo doesn't check who called unregister_handler, but simply unregisters the current handler. This patch adds a check so unregister is only called if a handler was registered by nouveau before. Signed-off-by: Andreas Heider Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index 284bd25d5d21..fc841e87b343 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -338,7 +338,8 @@ void nouveau_switcheroo_optimus_dsm(void) void nouveau_unregister_dsm_handler(void) { - vga_switcheroo_unregister_handler(); + if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected) + vga_switcheroo_unregister_handler(); } /* retrieve the ROM in 4k blocks */