[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 <redacted>
Signed-off-by: Rahul Lakkireddy <redacted>
---
 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

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski [off-list ref]:

On Tue, 23 Nov 2021 21:17:17 +0530 you wrote:

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 <redacted>
Signed-off-by: Rahul Lakkireddy <redacted>

[...]

Here is the summary with links:
  - [net-next] cxgb4: allow reading unrecognized port module eeprom
    https://git.kernel.org/netdev/net-next/c/e670e1e86beb

You are awesome, thank you!
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