netdev - [PATCH net-next] net: thunderbolt: Add comment clarifying prtcstns flags

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Message-Id: <20200622163022.53298-1-mika.westerberg@linux.intel.com>
Date:   Mon, 22 Jun 2020 19:30:22 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        netdev@...r.kernel.org
Subject: [PATCH net-next] net: thunderbolt: Add comment clarifying prtcstns flags

ThunderboltIP protocol currently has two flags from which we only
support and set match frags ID. The first flag is reserved for full E2E
flow control. Add a comment that clarifies them.

Suggested-by: Yehezkel Bernat <yehezkelshb@...il.com>
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/net/thunderbolt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/thunderbolt.c b/drivers/net/thunderbolt.c
index a812726703a4..3160443ef3b9 100644
--- a/drivers/net/thunderbolt.c
+++ b/drivers/net/thunderbolt.c
@@ -1335,6 +1335,10 @@ static int __init tbnet_init(void)
 	tb_property_add_immediate(tbnet_dir, "prtcid", 1);
 	tb_property_add_immediate(tbnet_dir, "prtcvers", 1);
 	tb_property_add_immediate(tbnet_dir, "prtcrevs", 1);
+	/* Currently only announce support for match frags ID (bit 1). Bit 0
+	 * is reserved for full E2E flow control which we do not support at
+	 * the moment.
+	 */
 	tb_property_add_immediate(tbnet_dir, "prtcstns",
 				  TBNET_MATCH_FRAGS_ID);
 
-- 
2.27.0