netdev - [PATCH net-next] cxgb4: allow reading unrecognized port module eeprom

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 23 Nov 2021 21:17:17 +0530
From:   Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, manojmalviya@...lsio.com
Subject: [PATCH net-next] cxgb4: allow reading unrecognized port module eeprom

Even if firmware fails to recognize the plugged-in port module type,
allow reading port module EEPROM anyway. This helps in obtaining
necessary diagnostics information for debugging and analysis.

Signed-off-by: Manoj Malviya <manojmalviya@...lsio.com>
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
index 0e4ec4079741..6c790af92170 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
@@ -1993,6 +1993,15 @@ static int get_dump_data(struct net_device *dev, struct ethtool_dump *eth_dump,
 	return 0;
 }
 
+static bool cxgb4_fw_mod_type_info_available(unsigned int fw_mod_type)
+{
+	/* Read port module EEPROM as long as it is plugged-in and
+	 * safe to read.
+	 */
+	return (fw_mod_type != FW_PORT_MOD_TYPE_NONE &&
+		fw_mod_type != FW_PORT_MOD_TYPE_ERROR);
+}
+
 static int cxgb4_get_module_info(struct net_device *dev,
 				 struct ethtool_modinfo *modinfo)
 {
@@ -2001,7 +2010,7 @@ static int cxgb4_get_module_info(struct net_device *dev,
 	struct adapter *adapter = pi->adapter;
 	int ret;
 
-	if (!t4_is_inserted_mod_type(pi->mod_type))
+	if (!cxgb4_fw_mod_type_info_available(pi->mod_type))
 		return -EINVAL;
 
 	switch (pi->port_type) {
-- 
2.27.0