RandR crtcs not fetched correctly when primary output is set.

Primary outputs may not have a CRTC.
Loops fetching CRTCs respecting primary output were broken.

Signed-off-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit 4de5705545792d77c9990bbec3e263a517757a2a)

3 files changed, 19 insertions, 11 deletions

diff --git a/randr/randr.c b/randr/randr.c
index 2e482f038..6fe9b56d8 100644
--- a/randr/randr.c
+++ b/randr/randr.c
@@ -438,7 +438,7 @@ RRFirstOutput (ScreenPtr pScreen)
     RROutputPtr		    output;
     int	i, j;
     
-    if (pScrPriv->primaryOutput)
+    if (pScrPriv->primaryOutput && pScrPriv->primaryOutput->crtc)
 	return pScrPriv->primaryOutput;
 
     for (i = 0; i < pScrPriv->numCrtcs; i++)
diff --git a/randr/rrscreen.c b/randr/rrscreen.c
index 9b1024e11..95662c9a9 100644
--- a/randr/rrscreen.c
+++ b/randr/rrscreen.c
@@ -324,7 +324,7 @@ rrGetScreenResources(ClientPtr client, Bool query)
     rrScrPrivPtr		pScrPriv;
     CARD8			*extra;
     unsigned long		extraLen;
-    int				i, n, rc, has_primary;
+    int				i, n, rc, has_primary = 0;
     RRCrtc			*crtcs;
     RROutput			*outputs;
     xRRModeInfo			*modeinfos;
@@ -402,19 +402,22 @@ rrGetScreenResources(ClientPtr client, Bool query)
 	modeinfos = (xRRModeInfo *) (outputs + pScrPriv->numOutputs);
 	names = (CARD8 *) (modeinfos + num_modes);
 
-	has_primary = (pScrPriv->primaryOutput != NULL);
-	if (pScrPriv->primaryOutput)
+	if (pScrPriv->primaryOutput && pScrPriv->primaryOutput->crtc)
 	{
-	    crtcs[0] = pScrPriv->primaryOutput->id;
+	    has_primary = 1;
+	    crtcs[0] = pScrPriv->primaryOutput->crtc->id;
 	    if (client->swapped)
 		swapl (&crtcs[0], n);
 	}
 	
 	for (i = 0; i < pScrPriv->numCrtcs; i++)
 	{
-	    if (pScrPriv->primaryOutput &&
+	    if (has_primary &&
 		pScrPriv->primaryOutput->crtc == pScrPriv->crtcs[i])
+	    {
+		has_primary = 0;
 		continue;
+	    }
 	    crtcs[i + has_primary] = pScrPriv->crtcs[i]->id;
 	    if (client->swapped)
 		swapl (&crtcs[i + has_primary], n);
diff --git a/randr/rrxinerama.c b/randr/rrxinerama.c
index 5af6fb03b..7f9a79827 100644
--- a/randr/rrxinerama.c
+++ b/randr/rrxinerama.c
@@ -328,16 +328,21 @@ ProcRRXineramaQueryScreens(ClientPtr client)
     if(rep.number) {
 	rrScrPriv(pScreen);
 	int i;
-	int has_primary = (pScrPriv->primaryOutput != NULL);
+	int has_primary = 0;
 
-	if (has_primary) {
+	if (pScrPriv->primaryOutput && pScrPriv->primaryOutput->crtc) {
+	    has_primary = 1;
 	    RRXineramaWriteCrtc(client, pScrPriv->primaryOutput->crtc);
 	}
 
 	for(i = 0; i < pScrPriv->numCrtcs; i++) {
-	    RRCrtcPtr	crtc = pScrPriv->crtcs[i];
-	    if (!has_primary || (crtc != pScrPriv->primaryOutput->crtc))
-		RRXineramaWriteCrtc(client, crtc);
+	    if (has_primary &&
+		pScrPriv->primaryOutput->crtc == pScrPriv->crtcs[i])
+	    {
+		has_primary = 0;
+		continue;
+	    }
+	    RRXineramaWriteCrtc(client, pScrPriv->crtcs[i]);
 	}
     }