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virgl: don't flush an empty range

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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@redhat.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Tested-by: Jakob Bornecrantz <jakob@collabora.com>
This commit is contained in:
Gurchetan Singh 2018-12-29 00:07:25 +01:00 • committed by Erik Faye-Lund
parent 393a756e6a
commit ca66457b05
1 changed files with 4 additions and 0 deletions
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4
src/gallium/drivers/virgl/virgl_buffer.c
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@ -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);
}