From bbec969b7f57a6ab5683145b99da869f99080e2a Mon Sep 17 00:00:00 2001
From: Ben Hutchings <bhutchings@solarflare.com>
Date: Tue, 11 Sep 2012 18:25:13 +0100
Subject: [PATCH] sfc: Fix check for failure of MC_CMD_FLUSH_RX_QUEUES

efx_mcdi_rpc_start() returns a negative value on error or zero on
success.  However one caller that can't properly handle failure then
does WARN_ON(rc > 0).  Change it to WARN_ON(rc < 0).

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
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