netdev - [PATCH v2 1/1] ixgbe: correct SDP0 check of SFP cage for X550

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Message-Id: <20220425131758.4749-1-jeffd@silicom-usa.com>
Date:   Mon, 25 Apr 2022 09:17:57 -0400
From:   Jeff Daly <jeffd@...icom-usa.com>
To:     intel-wired-lan@...osl.org
Cc:     Stephen Douthit <stephend@...icom-usa.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Don Skidmore <donald.c.skidmore@...el.com>,
        intel-wired-lan@...ts.osuosl.org (moderated list:INTEL ETHERNET DRIVERS),
        netdev@...r.kernel.org (open list:NETWORKING DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 1/1] ixgbe: correct SDP0 check of SFP cage for X550

SDP0 for X550 NICs is active low to indicate the presence of an SFP in the
cage (MOD_ABS#).  Invert the results of the logical AND to set
sfp_cage_full variable correctly.

Fixes: aac9e053f104 ("ixgbe: cleanup crosstalk fix")
Suggested-by: Stephen Douthit <stephend@...icom-usa.com>
Signed-off-by: Jeff Daly <jeffd@...icom-usa.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
index 4c26c4b92f07..13482d4e24e2 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
@@ -3299,17 +3299,17 @@ s32 ixgbe_check_mac_link_generic(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
 	 * the SFP+ cage is full.
 	 */
 	if (ixgbe_need_crosstalk_fix(hw)) {
-		u32 sfp_cage_full;
+		bool sfp_cage_full;
 
 		switch (hw->mac.type) {
 		case ixgbe_mac_82599EB:
-			sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
-					IXGBE_ESDP_SDP2;
+			sfp_cage_full = !!(IXGBE_READ_REG(hw, IXGBE_ESDP) &
+					   IXGBE_ESDP_SDP2);
 			break;
 		case ixgbe_mac_X550EM_x:
 		case ixgbe_mac_x550em_a:
-			sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
-					IXGBE_ESDP_SDP0;
+			sfp_cage_full = !(IXGBE_READ_REG(hw, IXGBE_ESDP) &
+					  IXGBE_ESDP_SDP0);
 			break;
 		default:
 			/* sanity check - No SFP+ devices here */
-- 
2.25.1