On Wed, Nov 20, 2019 at 3:27 PM Borislav Petkov <bp@xxxxxxxxx> wrote: > > On Wed, Nov 20, 2019 at 03:19:23PM -0800, Luck, Tony wrote: > > That's the underlying functionality of the MOVDIR64B instruction. A > > posted write so no way to know if it succeeded. > > So how do you know whether any of the writes went through? It's identical to the writel() mmio-write to start a SATA command transfer. The higher level device driver protocol validates that the command went through, ultimately with a timeout. There's no return value for iosubmit_cmds512() for the same reason there's no return value for the other iowrite primitives.
