From: Jubin John Date: Thu, 9 Jun 2016 14:51:27 +0000 (-0700) Subject: IB/hfi1: Increase packet egress timeout X-Git-Tag: v4.7-rc5~12^2^2~9 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=c3c64a951cbdb6096d02dcc339a9c807ce1e976a;p=linux.git IB/hfi1: Increase packet egress timeout The current value of 500us for the packet egress timeout is too small which causes the host to declare failure on draining packets too early and unnecessarily bounces the link. Increase this to 50ms taking into account the switch packet discard timer default and the worst case per-VL package drainage rate. Reviewed-by: Dean Luick Signed-off-by: Jubin John Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/hw/hfi1/pio.c b/drivers/infiniband/hw/hfi1/pio.c index e0e1ff2a0c72..d4022450b73f 100644 --- a/drivers/infiniband/hw/hfi1/pio.c +++ b/drivers/infiniband/hw/hfi1/pio.c @@ -995,7 +995,7 @@ static void sc_wait_for_packet_egress(struct send_context *sc, int pause) /* counter is reset if occupancy count changes */ if (reg != reg_prev) loop = 0; - if (loop > 500) { + if (loop > 50000) { /* timed out - bounce the link */ dd_dev_err(dd, "%s: context %u(%u) timeout waiting for packets to egress, remaining count %u, bouncing link\n",