diff mbox series

[net] net: phy: Ensure state transitions are processed from phy_stop()

Message ID 20230316203325.2026217-1-f.fainelli@gmail.com (mailing list archive)
State Accepted
Commit 4203d84032e28f893594a453bd8bc9c3b15c7334
Delegated to: Netdev Maintainers
Headers show
Series [net] net: phy: Ensure state transitions are processed from phy_stop() | expand

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Context Check Description
netdev/series_format success Single patches do not need cover letters
netdev/tree_selection success Clearly marked for net
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 18 this patch: 18
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 18 this patch: 18
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 18 this patch: 18
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 53 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Florian Fainelli March 16, 2023, 8:33 p.m. UTC 
In the phy_disconnect() -> phy_stop() path, we will be forcibly setting
the PHY state machine to PHY_HALTED. This invalidates the old_state !=
phydev->state condition in phy_state_machine() such that we will neither
display the state change for debugging, nor will we invoke the
link_change_notify() callback.

Factor the code by introducing phy_process_state_change(), and ensure
that we process the state change from phy_stop() as well.

Fixes: 5c5f626bcace ("net: phy: improve handling link_change_notify callback")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/net/phy/phy.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org March 19, 2023, 10:50 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@davemloft.net>:

On Thu, 16 Mar 2023 13:33:24 -0700 you wrote:
> In the phy_disconnect() -> phy_stop() path, we will be forcibly setting
> the PHY state machine to PHY_HALTED. This invalidates the old_state !=
> phydev->state condition in phy_state_machine() such that we will neither
> display the state change for debugging, nor will we invoke the
> link_change_notify() callback.
> 
> Factor the code by introducing phy_process_state_change(), and ensure
> that we process the state change from phy_stop() as well.
> 
> [...]

Here is the summary with links:
  - [net] net: phy: Ensure state transitions are processed from phy_stop()
    https://git.kernel.org/netdev/net/c/4203d84032e2

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index b33e55a7364e..99a07eb54c44 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -57,6 +57,18 @@  static const char *phy_state_to_str(enum phy_state st)
 	return NULL;
 }
 
+static void phy_process_state_change(struct phy_device *phydev,
+				     enum phy_state old_state)
+{
+	if (old_state != phydev->state) {
+		phydev_dbg(phydev, "PHY state change %s -> %s\n",
+			   phy_state_to_str(old_state),
+			   phy_state_to_str(phydev->state));
+		if (phydev->drv && phydev->drv->link_change_notify)
+			phydev->drv->link_change_notify(phydev);
+	}
+}
+
 static void phy_link_up(struct phy_device *phydev)
 {
 	phydev->phy_link_change(phydev, true);
@@ -1301,6 +1313,7 @@  EXPORT_SYMBOL(phy_free_interrupt);
 void phy_stop(struct phy_device *phydev)
 {
 	struct net_device *dev = phydev->attached_dev;
+	enum phy_state old_state;
 
 	if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
 		WARN(1, "called from state %s\n",
@@ -1309,6 +1322,7 @@  void phy_stop(struct phy_device *phydev)
 	}
 
 	mutex_lock(&phydev->lock);
+	old_state = phydev->state;
 
 	if (phydev->state == PHY_CABLETEST) {
 		phy_abort_cable_test(phydev);
@@ -1319,6 +1333,7 @@  void phy_stop(struct phy_device *phydev)
 		sfp_upstream_stop(phydev->sfp_bus);
 
 	phydev->state = PHY_HALTED;
+	phy_process_state_change(phydev, old_state);
 
 	mutex_unlock(&phydev->lock);
 
@@ -1436,13 +1451,7 @@  void phy_state_machine(struct work_struct *work)
 	if (err < 0)
 		phy_error(phydev);
 
-	if (old_state != phydev->state) {
-		phydev_dbg(phydev, "PHY state change %s -> %s\n",
-			   phy_state_to_str(old_state),
-			   phy_state_to_str(phydev->state));
-		if (phydev->drv && phydev->drv->link_change_notify)
-			phydev->drv->link_change_notify(phydev);
-	}
+	phy_process_state_change(phydev, old_state);
 
 	/* Only re-schedule a PHY state machine change if we are polling the
 	 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving