Commit 1db76c14 authored May 17, 2006 by Roland Dreier

IB/mthca: Make fw_cmd_doorbell default to 0



Setting fw_cmd_doorbell allows FW command to be queued using posted
writes instead of requiring polling on a "go" bit, so it should be a
performance boost.  However, the option causes problems with at least
some device/firmware combinations, so set the default to 0 until we
understand what's going on better.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

parent 032ebf26

drivers/infiniband/hw/mthca/mthca_cmd.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -182,7 +182,7 @@ struct mthca_cmd_context {
		u8 status;
		};

		static int fw_cmd_doorbell = 1;
		static int fw_cmd_doorbell = 0;
		module_param(fw_cmd_doorbell, int, 0644);
		MODULE_PARM_DESC(fw_cmd_doorbell, "post FW commands through doorbell page if nonzero "
		"(and supported by FW)");