From: Michel Dänzer <[email protected]>

Should make the amdgpu_drm_queue_alloc error handling clearer, and gets
rid of a compile warning about it returning NULL.

(Ported from radeon commit a37af701768b12d86868a831a79f1e02ee4968cf)

Signed-off-by: Michel Dänzer <[email protected]>
---
 src/amdgpu_dri2.c      | 4 ++--
 src/amdgpu_drm_queue.c | 7 ++++---
 src/amdgpu_drm_queue.h | 2 ++
 src/amdgpu_kms.c       | 4 ++--
 src/amdgpu_present.c   | 2 +-
 src/drmmode_display.c  | 2 +-
 6 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/amdgpu_dri2.c b/src/amdgpu_dri2.c
index 1cbf1eb..31ac3f3 100644
--- a/src/amdgpu_dri2.c
+++ b/src/amdgpu_dri2.c
@@ -1035,7 +1035,7 @@ static int amdgpu_dri2_schedule_wait_msc(ClientPtr 
client, DrawablePtr draw,
        drm_queue_seq = amdgpu_drm_queue_alloc(crtc, client, 
AMDGPU_DRM_QUEUE_ID_DEFAULT,
                                               wait_info, 
amdgpu_dri2_frame_event_handler,
                                               amdgpu_dri2_frame_event_abort);
-       if (!drm_queue_seq) {
+       if (drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR) {
                xf86DrvMsg(scrn->scrnIndex, X_WARNING,
                           "Allocating DRM queue event entry failed.\n");
                goto out_complete;
@@ -1183,7 +1183,7 @@ static int amdgpu_dri2_schedule_swap(ClientPtr client, 
DrawablePtr draw,
        drm_queue_seq = amdgpu_drm_queue_alloc(crtc, client, 
AMDGPU_DRM_QUEUE_ID_DEFAULT,
                                               swap_info, 
amdgpu_dri2_frame_event_handler,
                                               amdgpu_dri2_frame_event_abort);
-       if (!drm_queue_seq) {
+       if (drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR) {
                xf86DrvMsg(scrn->scrnIndex, X_WARNING,
                           "Allocating DRM queue entry failed.\n");
                goto blit_fallback;
diff --git a/src/amdgpu_drm_queue.c b/src/amdgpu_drm_queue.c
index 562a11a..e8810fd 100644
--- a/src/amdgpu_drm_queue.c
+++ b/src/amdgpu_drm_queue.c
@@ -92,10 +92,11 @@ amdgpu_drm_queue_alloc(xf86CrtcPtr crtc, ClientPtr client,
 
        e = calloc(1, sizeof(struct amdgpu_drm_queue_entry));
        if (!e)
-               return NULL;
+               return AMDGPU_DRM_QUEUE_ERROR;
+
+       if (_X_UNLIKELY(amdgpu_drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR))
+               amdgpu_drm_queue_seq++;
 
-       if (!amdgpu_drm_queue_seq)
-               amdgpu_drm_queue_seq = 1;
        e->seq = amdgpu_drm_queue_seq++;
        e->client = client;
        e->crtc = crtc;
diff --git a/src/amdgpu_drm_queue.h b/src/amdgpu_drm_queue.h
index b4d4009..36ee900 100644
--- a/src/amdgpu_drm_queue.h
+++ b/src/amdgpu_drm_queue.h
@@ -31,6 +31,8 @@
 
 #include <xf86Crtc.h>
 
+#define AMDGPU_DRM_QUEUE_ERROR 0
+
 #define AMDGPU_DRM_QUEUE_CLIENT_DEFAULT serverClient
 #define AMDGPU_DRM_QUEUE_ID_DEFAULT ~0ULL
 
diff --git a/src/amdgpu_kms.c b/src/amdgpu_kms.c
index d9f15a4..9f023cf 100644
--- a/src/amdgpu_kms.c
+++ b/src/amdgpu_kms.c
@@ -426,7 +426,7 @@ amdgpu_scanout_update(xf86CrtcPtr xf86_crtc)
                                               drmmode_crtc,
                                               amdgpu_scanout_update_handler,
                                               amdgpu_scanout_update_abort);
-       if (!drm_queue_seq) {
+       if (drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR) {
                xf86DrvMsg(scrn->scrnIndex, X_WARNING,
                           "amdgpu_drm_queue_alloc failed for scanout 
update\n");
                return;
@@ -480,7 +480,7 @@ amdgpu_scanout_flip(ScreenPtr pScreen, AMDGPUInfoPtr info,
                                               AMDGPU_DRM_QUEUE_ID_DEFAULT,
                                               drmmode_crtc, NULL,
                                               amdgpu_scanout_flip_abort);
-       if (!drm_queue_seq) {
+       if (drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR) {
                xf86DrvMsg(scrn->scrnIndex, X_WARNING,
                           "Allocating DRM event queue entry failed.\n");
                return;
diff --git a/src/amdgpu_present.c b/src/amdgpu_present.c
index edfccb1..192c410 100644
--- a/src/amdgpu_present.c
+++ b/src/amdgpu_present.c
@@ -170,7 +170,7 @@ amdgpu_present_queue_vblank(RRCrtcPtr crtc, uint64_t 
event_id, uint64_t msc)
                                               event_id, event,
                                               amdgpu_present_vblank_handler,
                                               amdgpu_present_vblank_abort);
-       if (!drm_queue_seq) {
+       if (drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR) {
                free(event);
                return BadAlloc;
        }
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index fdd5922..3063fac 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -2537,7 +2537,7 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr 
client,
                                                       flipdata,
                                                       drmmode_flip_handler,
                                                       drmmode_flip_abort);
-               if (!drm_queue_seq) {
+               if (drm_queue_seq == AMDGPU_DRM_QUEUE_ERROR) {
                        xf86DrvMsg(scrn->scrnIndex, X_WARNING,
                                   "Allocating DRM queue event entry 
failed.\n");
                        goto error;
-- 
2.9.3

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