radeon/winsys: correct RADEON_GEM_WAIT_IDLE use

RADEON_GEM_WAIT_IDLE is declared DRM_IOW but mesa
uses it with drmCommandWriteRead instead of drmCommandWrite
which leads to the ioctl being unmatched and returning an
error on at least OpenBSD.

Problem originally noticed in libdrm by Mark Kettenis.
Dave Airlie pointed out that mesa has the same issue.

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>

diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_bo.c b/src/gallium/winsys/radeon/drm/radeon_drm_bo.c
index 6ec1713..bcd4b27 100644 (file)
--- a/src/gallium/winsys/radeon/drm/radeon_drm_bo.c
+++ b/src/gallium/winsys/radeon/drm/radeon_drm_bo.c
@@ -167,7 +167,7 @@ static void radeon_bo_wait(struct pb_buffer *_buf, enum radeon_bo_usage usage)
         struct drm_radeon_gem_wait_idle args;
         memset(&args, 0, sizeof(args));
         args.handle = bo->handle;
-        while (drmCommandWriteRead(bo->rws->fd, DRM_RADEON_GEM_WAIT_IDLE,
+        while (drmCommandWrite(bo->rws->fd, DRM_RADEON_GEM_WAIT_IDLE,
                                    &args, sizeof(args)) == -EBUSY);
     }
 }

diff --git a/src/gallium/winsys/radeon/tools/radeon_ctx.h b/src/gallium/winsys/radeon/tools/radeon_ctx.h
index c2967ff..1eecfd5 100644 (file)
--- a/src/gallium/winsys/radeon/tools/radeon_ctx.h
+++ b/src/gallium/winsys/radeon/tools/radeon_ctx.h
@@ -98,7 +98,7 @@ static void bo_wait(struct ctx *ctx, struct bo *bo)
     memset(&args, 0, sizeof(args));
     args.handle = bo->handle;
     do {
-        r = drmCommandWriteRead(ctx->fd, DRM_RADEON_GEM_WAIT_IDLE, &args, sizeof(args));
+        r = drmCommandWrite(ctx->fd, DRM_RADEON_GEM_WAIT_IDLE, &args, sizeof(args));
     } while (r == -EBUSY);
 }