Mesa (master): virgl: don't flush an empty range
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Thu Jan 3 20:00:01 UTC 2019
Module: Mesa
Branch: master
Commit: ca66457b0516ef8af5ef17c54460ab8d9aefc5fa
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ca66457b0516ef8af5ef17c54460ab8d9aefc5fa
Author: Gurchetan Singh <gurchetansingh at chromium.org>
Date: Sat Dec 29 00:07:25 2018 +0100
virgl: don't flush an empty range
Otherwise, the gl-1.0-long-dlist Piglit test crashes.
Fixes: db7757 ("virgl: modify how we handle GL_MAP_FLUSH_EXPLICIT_BIT")
Reported by airlied@
v2: Exit on any invalid range (Erik)
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109190
Reviewed-by: Dave Airlie <airlied at redhat.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund at collabora.com>
Tested-by: Jakob Bornecrantz <jakob at collabora.com>
---
src/gallium/drivers/virgl/virgl_buffer.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/gallium/drivers/virgl/virgl_buffer.c b/src/gallium/drivers/virgl/virgl_buffer.c
index cee26da41b..4d30c6c340 100644
--- a/src/gallium/drivers/virgl/virgl_buffer.c
+++ b/src/gallium/drivers/virgl/virgl_buffer.c
@@ -83,6 +83,9 @@ static void virgl_buffer_transfer_unmap(struct pipe_context *ctx,
if (trans->base.usage & PIPE_TRANSFER_WRITE) {
struct virgl_screen *vs = virgl_screen(ctx->screen);
if (transfer->usage & PIPE_TRANSFER_FLUSH_EXPLICIT) {
+ if (trans->range.end <= trans->range.start)
+ goto out;
+
transfer->box.x += trans->range.start;
transfer->box.width = trans->range.end - trans->range.start;
trans->offset = transfer->box.x;
@@ -96,6 +99,7 @@ static void virgl_buffer_transfer_unmap(struct pipe_context *ctx,
}
+out:
virgl_resource_destroy_transfer(vctx, trans);
}
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