linux-kernel - Re: [Intel-gfx] [PATCH 5/5] drm/i915: Kick out vga console

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Date:	Mon, 7 Jul 2014 14:26:54 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Ed Tomlinson <edt@....ca>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
	DRI Development <dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	linux-fbdev@...r.kernel.org,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Dave Airlie <airlied@...ux.ie>
Subject: Re: [Intel-gfx] [PATCH 5/5] drm/i915: Kick out vga console

On Mon, Jul 07, 2014 at 06:45:49AM -0400, Ed Tomlinson wrote:
> Daniel,
> 
> I am not quite sure I understand what you want me to test?
> Do you want me to try it without:
> 
> > > +               if (ret == 0) {
> > > +                       ret = do_unregister_con_driver(&vga_con);

Below the diff of what I mean.
-Daniel


diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 5e583a1838f8..bd8517151479 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1466,12 +1466,13 @@ static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 #else
 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 {
-	int ret;
+	int ret = 0;
 
 	DRM_INFO("Replacing VGA console driver\n");
 
 	console_lock();
-	ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
+	if (con_is_bound(&vga_con))
+		ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
 	if (ret == 0) {
 		ret = do_unregister_con_driver(&vga_con);
 
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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