From: Franck BAUR The suspend path disables the RX engine and resets the MAC before jme_powersave_phy() programs PMCS for wake-on-LAN. The MAC reset leaves GPREG1_RXCLKOFF set, so the RX MAC clock remains gated when WoL is armed. On a JMicron JMC250 [197b:0250] revision 03, PMCS_MFEN is programmed correctly but Magic Packet detection does not work while the RX MAC clock is gated. Instrumenting JME_PMCS showed that MFDET remained clear after receiving Magic Packets. Re-enabling the RX MAC clock immediately before enabling WoL makes MFDET assert and restores wake from ACPI S3. An A/B test without a Magic Packet remained suspended until the RTC wake alarm. The wakeup was reproduced repeatedly with the patched driver. Keep the RX MAC clock running while WoL is armed. Fixes: 854a2e7c331a ("jme: Safer MAC processor reset sequence") Cc: stable@vger.kernel.org Assisted-by: LLM Signed-off-by: Franck BAUR --- drivers/net/ethernet/jme.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c index 25ec5f757c6828a5f5241340bf3fb01d8e0aa3e9..27ac7405f76fed169d9f1fa84d9875611dcf119c 100644 --- a/drivers/net/ethernet/jme.c +++ b/drivers/net/ethernet/jme.c @@ -1892,6 +1892,7 @@ jme_powersave_phy(struct jme_adapter *jme) jme_set_100m_half(jme); if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN)) jme_wait_link(jme); + jme_mac_rxclk_on(jme); jme_clear_pm_enable_wol(jme); } else { jme_phy_off(jme); --- base-commit: af32da41b0327b9c6a37856ba82b6760d6c8d10e change-id: 20261011-jme-wol-submit-9df9accc5367 Best regards, -- Franck BAUR