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authorRoland Dreier <rolandd@cisco.com>2006-05-17 07:48:07 -0700
committerRoland Dreier <rolandd@cisco.com>2006-05-17 07:48:07 -0700
commit1db76c14d215c8b26024dd532de3dcaf66ea30f7 (patch)
tree6c9c22c450e20e98b75e835930c897c99477c788
parent032ebf2620ef99a4fedaa0f77dc2272095ac5863 (diff)
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>
-rw-r--r--drivers/infiniband/hw/mthca/mthca_cmd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 1985b5dfa48..798e13e14fa 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -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)");