[PATCH V2 1/2] net: phy: Make phy_interface_is_sgmii a switch statement

[Nishanth Menon]

Recent commit 75d28899e3e9 ("net: phy: Synchronize PHY interface modes
with Linux") reordered the enum definitions. This caused the range of
enums that this api was checking to go bad.

While it is possible for the phy drivers to practically use the enum's
directly, drivers such as dp83867 use this helper to manage the
configuration of the phy correctly.

Reported-by: Tom Rini <trini at konsulko.com>
Signed-off-by: Nishanth Menon <nm at ti.com>
---
Changes Since v1:
* Switch update based on feedback from Marek

V1: https://lore.kernel.org/r/20230413180713.2922524-2-nm@ti.com

 include/phy.h | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/phy.h b/include/phy.h
index a837fed72352..51dadcf14478 100644
--- a/include/phy.h
+++ b/include/phy.h
@@ -373,8 +373,15 @@ static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
  */
 static inline bool phy_interface_is_sgmii(struct phy_device *phydev)
 {
-	return phydev->interface >= PHY_INTERFACE_MODE_SGMII &&
-		phydev->interface <= PHY_INTERFACE_MODE_QSGMII;
+	switch (phydev->interface) {
+	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_QUSGMII:
+	case PHY_INTERFACE_MODE_USXGMII:
+	case PHY_INTERFACE_MODE_QSGMII:
+		return 1;
+	default:
+		return 0;
+	}
 }
 
 bool phy_interface_is_ncsi(void);
-- 
2.40.0