netdev - [PATCH v2 iwl-next 09/10] ice: fall back to TCXO on TSPLL lock fail

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

Message-ID: <20250409122830.1977644-21-karol.kolacinski@intel.com>
Date: Wed,  9 Apr 2025 14:25:06 +0200
From: Karol Kolacinski <karol.kolacinski@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	anthony.l.nguyen@...el.com,
	przemyslaw.kitszel@...el.com,
	Karol Kolacinski <karol.kolacinski@...el.com>,
	Milena Olech <milena.olech@...el.com>
Subject: [PATCH v2 iwl-next 09/10] ice: fall back to TCXO on TSPLL lock fail

TSPLL can fail when trying to lock to TIME_REF as a clock source, e.g.
when the external clock source is not stable or connected to the board.
To continue operation after failure, try to lock again to internal TCXO
and inform user about this.

Reviewed-by: Milena Olech <milena.olech@...el.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_tspll.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_tspll.c b/drivers/net/ethernet/intel/ice/ice_tspll.c
index 25a805fa0bdd..b81eb6d2a0de 100644
--- a/drivers/net/ethernet/intel/ice/ice_tspll.c
+++ b/drivers/net/ethernet/intel/ice/ice_tspll.c
@@ -490,5 +490,17 @@ int ice_tspll_init(struct ice_hw *hw)
 	/* Configure the TSPLL using the parameters from the function
 	 * capabilities.
 	 */
-	return ice_tspll_cfg(hw, tspll_freq, clk_src);
+	err = ice_tspll_cfg(hw, tspll_freq, clk_src);
+	if (err) {
+		dev_warn(ice_hw_to_dev(hw), "Failed to lock TSPLL to predefined frequency. Retrying with fallback frequency.\n");
+
+		/* Try to lock to internal TCXO as a fallback. */
+		tspll_freq = ice_tspll_default_freq(hw->mac_type);
+		clk_src = ICE_CLK_SRC_TCXO;
+		err = ice_tspll_cfg(hw, tspll_freq, clk_src);
+		if (err)
+			dev_warn(ice_hw_to_dev(hw), "Failed to lock TSPLL to fallback frequency.\n");
+	}
+
+	return err;
 }
-- 
2.49.0