4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chris Wilson chris@chris-wilson.co.uk
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@chris-wilson.co.uk Cc: Sumit Semwal sumit.semwal@linaro.org Cc: Sean Paul seanpaul@chromium.org Cc: Gustavo Padovan gustavo@padovan.org Reviewed-by: Sean Paul seanpaul@chromium.org Signed-off-by: Gustavo Padovan gustavo.padovan@collabora.com Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-3-chris@chri... [s/dma_fence/fence/g - gregkh] Cc: Jisheng Zhang Jisheng.Zhang@synaptics.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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;