Patch "net: amd-xgbe: Fix logic around active and passive cables" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    net: amd-xgbe: Fix logic around active and passive cables

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-amd-xgbe-fix-logic-around-active-and-passive-cab.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9d2457df7a25ab4358e2c9d1951f199dd1eba2fd
Author: Tom Lendacky <thomas.lendacky@xxxxxxx>
Date:   Thu Dec 8 10:22:24 2022 -0600

    net: amd-xgbe: Fix logic around active and passive cables
    
    [ Upstream commit 4998006c73afe44e2f639d55bd331c6c26eb039f ]
    
    SFP+ active and passive cables are copper cables with fixed SFP+ end
    connectors. Due to a misinterpretation of this, SFP+ active cables could
    end up not being recognized, causing the driver to fail to establish a
    connection.
    
    Introduce a new enum in SFP+ cable types, XGBE_SFP_CABLE_FIBER, that is
    the default cable type, and handle active and passive cables when they are
    specifically detected.
    
    Fixes: abf0a1c2b26a ("amd-xgbe: Add support for SFP+ modules")
    Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
index d54e6e138aaf..098792eb279c 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
@@ -188,6 +188,7 @@ enum xgbe_sfp_cable {
 	XGBE_SFP_CABLE_UNKNOWN = 0,
 	XGBE_SFP_CABLE_ACTIVE,
 	XGBE_SFP_CABLE_PASSIVE,
+	XGBE_SFP_CABLE_FIBER,
 };
 
 enum xgbe_sfp_base {
@@ -1136,16 +1137,18 @@ static void xgbe_phy_sfp_parse_eeprom(struct xgbe_prv_data *pdata)
 	phy_data->sfp_tx_fault = xgbe_phy_check_sfp_tx_fault(phy_data);
 	phy_data->sfp_rx_los = xgbe_phy_check_sfp_rx_los(phy_data);
 
-	/* Assume ACTIVE cable unless told it is PASSIVE */
+	/* Assume FIBER cable unless told otherwise */
 	if (sfp_base[XGBE_SFP_BASE_CABLE] & XGBE_SFP_BASE_CABLE_PASSIVE) {
 		phy_data->sfp_cable = XGBE_SFP_CABLE_PASSIVE;
 		phy_data->sfp_cable_len = sfp_base[XGBE_SFP_BASE_CU_CABLE_LEN];
-	} else {
+	} else if (sfp_base[XGBE_SFP_BASE_CABLE] & XGBE_SFP_BASE_CABLE_ACTIVE) {
 		phy_data->sfp_cable = XGBE_SFP_CABLE_ACTIVE;
+	} else {
+		phy_data->sfp_cable = XGBE_SFP_CABLE_FIBER;
 	}
 
 	/* Determine the type of SFP */
-	if (phy_data->sfp_cable == XGBE_SFP_CABLE_PASSIVE &&
+	if (phy_data->sfp_cable != XGBE_SFP_CABLE_FIBER &&
 	    xgbe_phy_sfp_bit_rate(sfp_eeprom, XGBE_SFP_SPEED_10000))
 		phy_data->sfp_base = XGBE_SFP_BASE_10000_CR;
 	else if (sfp_base[XGBE_SFP_BASE_10GBE_CC] & XGBE_SFP_BASE_10GBE_CC_SR)



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