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winsys/svga: Don't abort on EBUSY errors from execbuffer 

This error code typically indicated that a buffer object that was referenced
by the command stream was being used for CPU access by another client.
The correct action here is to retry after a while. Use usleep() until we
have proper kernel support for this wait.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Thomas Hellstrom 2019-04-04 12:20:54 +02:00
parent c69557c4a2
commit 20b7839392
1 changed files with 3 additions and 1 deletions
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4
src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
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@ -564,7 +564,9 @@ vmw_ioctl_command(struct vmw_winsys_screen *vws, int32_t cid,
offsetof(struct drm_vmw_execbuf_arg, context_handle);
do {
ret = drmCommandWrite(vws->ioctl.drm_fd, DRM_VMW_EXECBUF, &arg, argsize);
} while(ret == -ERESTART);
if (ret == -EBUSY)
usleep(1000);
} while(ret == -ERESTART || ret == -EBUSY);
if (ret) {
vmw_error("%s error %s.\n", __FUNCTION__, strerror(-ret));
abort();