4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> commit 8f66d3aa1735bc95ae58d846a157357e8d41abb8 upstream. The timeline is u32, which limits any single advance to INT_MAX so that we can detect all fences that need signaling. Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx> Cc: Sean Paul <seanpaul@xxxxxxxxxxxx> Cc: Gustavo Padovan <gustavo@xxxxxxxxxxx> Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx> Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx> Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-3-chris@xxxxxxxxxxxxxxxxxx [s/dma_fence/fence/g - gregkh] Cc: Jisheng Zhang <Jisheng.Zhang@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/dma-buf/sw_sync.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -345,6 +345,11 @@ static long sw_sync_ioctl_inc(struct syn if (copy_from_user(&value, (void __user *)arg, sizeof(value))) return -EFAULT; + while (value > INT_MAX) { + sync_timeline_signal(obj, INT_MAX); + value -= INT_MAX; + } + sync_timeline_signal(obj, value); return 0;