[PATCH net v3] net: phy: fix phy_start to consider PHY_IGNORE_INTERRUPT

[Heiner Kallweit]

This condition wasn't adjusted when PHY_IGNORE_INTERRUPT (-2) was added
long ago. In case of PHY_IGNORE_INTERRUPT the MAC interrupt indicates
also PHY state changes and we should do what the symbol says.

Fixes: 84a527a41f38 ("net: phylib: fix interrupts re-enablement in phy_start")
Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
v2:
- use phy_interrupt_is_valid() instead of checking for irq > 0
v3:
- added "Fixes" tag
- fix is a candidate for stable, v4.9+
---
 drivers/net/phy/phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index f3313a129..50ed35a45 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -822,7 +822,7 @@ void phy_start(struct phy_device *phydev)
                phy_resume(phydev);
 
                /* make sure interrupts are re-enabled for the PHY */
-               if (phydev->irq != PHY_POLL) {
+               if (phy_interrupt_is_valid(phydev)) {
                        err = phy_enable_interrupts(phydev);
                        if (err < 0)
                                break;
-- 
2.16.1