[PATCH net v2 09/10] net: systemport: Fix unbalanced Wake-on-LAN clock disable in resume

[Florian Fainelli <florian.fainelli@broadcom.com>]

In bcm_sysport_suspend(), the Wake-on-LAN clock (priv->wol_clk) is only
prepared and enabled if both device_may_wakeup(d) and priv->wolopts are
true.

In bcm_sysport_resume(), however, clk_disable_unprepare(priv->wol_clk)
was called whenever priv->wolopts was non-zero, regardless of
device_may_wakeup(d). If the system entered suspend with Wake-on-LAN
disabled at the device level (e.g., via sysfs wakeup control), this
resulted in an unbalanced clk_disable_unprepare() call on resume.

Fix this by mirroring the suspend check in bcm_sysport_resume().

Fixes: 6328a126896e ("net: systemport: Manage Wake-on-LAN clock")
Assisted-by: LLM
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 drivers/net/ethernet/broadcom/bcmsysport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 11b2cb4cc792..dedd49ad6c4e 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2799,7 +2799,7 @@ static int __maybe_unused bcm_sysport_resume(struct device *d)
 		return ret;
 	}
 
-	if (priv->wolopts)
+	if (device_may_wakeup(d) && priv->wolopts)
 		clk_disable_unprepare(priv->wol_clk);
 
 	umac_reset(priv);
-- 
2.34.1