From 55029c1d65158aea9672c5dfadb43a57f23e3100 Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Wed, 13 Jan 2010 04:34:25 +0000 Subject: [PATCH 1/5] sfc: Fix polling for slow MCDI operations When the interface is down and we are using polled mode for MCDI operations, we busy-wait for completion for approximately 1 jiffy using udelay() and then back off to schedule(). But the completion will not wake the task, since we are using polled mode! We must use schedule_timeout_uninterruptible() instead. Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller --- drivers/net/sfc/mcdi.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/sfc/mcdi.c b/drivers/net/sfc/mcdi.c index 683353b..0d4eba7 100644 --- a/drivers/net/sfc/mcdi.c +++ b/drivers/net/sfc/mcdi.c @@ -142,8 +142,9 @@ static int efx_mcdi_poll(struct efx_nic *efx) if (spins != 0) { --spins; udelay(1); - } else - schedule(); + } else { + schedule_timeout_uninterruptible(1); + } time = get_seconds(); -- 1.6.6