netdev - [PATCH 01/18] thunderbolt: Disable retry logic for intra-domain control packets

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Date:   Thu,  4 Mar 2021 15:31:08 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     linux-usb@...r.kernel.org
Cc:     Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Andreas Noever <andreas.noever@...il.com>,
        Isaac Hazan <isaac.hazan@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Lukas Wunner <lukas@...ner.de>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH 01/18] thunderbolt: Disable retry logic for intra-domain control packets

In most cases the response packet is lost because the router in question
was disconnected by the user. Resending the control packet in that case
just adds unnecessary delays, so disable that for intra-domain control
packets. For inter-domain (XDomain) packets we continue retrying.

This also aligns the driver better what the Intel connection manager
firmware is doing.

Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/thunderbolt/ctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index f1aeaff9f368..875922133782 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -17,7 +17,7 @@
 
 
 #define TB_CTL_RX_PKG_COUNT	10
-#define TB_CTL_RETRIES		4
+#define TB_CTL_RETRIES		1
 
 /**
  * struct tb_ctl - Thunderbolt control channel
-- 
2.30.1