diff mbox series

[net-next,v4,04/17] net: dsa: microchip: allow to pass return values for PHY read/write accesses

Message ID 20220826105634.3855578-5-o.rempel@pengutronix.de (mailing list archive)
State Accepted
Commit 8f420456792308639fcbc15462050c521fbd127d
Delegated to: Netdev Maintainers
Headers show
Series net: dsa: microchip: add error handling and register access validation | expand

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netdev/fixes_present success Fixes tag not required for -next series
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netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 1 maintainers not CCed: linux@armlinux.org.uk
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 144 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Oleksij Rempel Aug. 26, 2022, 10:56 a.m. UTC 
PHY access may end with errors on different levels. So, allow to forward
return values where possible.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
---
 drivers/net/dsa/microchip/ksz8.h         |  4 ++--
 drivers/net/dsa/microchip/ksz8795.c      |  8 ++++++--
 drivers/net/dsa/microchip/ksz9477.c      | 12 ++++++++----
 drivers/net/dsa/microchip/ksz9477.h      |  4 ++--
 drivers/net/dsa/microchip/ksz_common.c   | 10 ++++++++--
 drivers/net/dsa/microchip/ksz_common.h   |  4 ++--
 drivers/net/dsa/microchip/lan937x.h      |  4 ++--
 drivers/net/dsa/microchip/lan937x_main.c |  8 ++++----
 8 files changed, 34 insertions(+), 20 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/microchip/ksz8.h b/drivers/net/dsa/microchip/ksz8.h
index 42c50cc4d8536..8582b4b67d989 100644
--- a/drivers/net/dsa/microchip/ksz8.h
+++ b/drivers/net/dsa/microchip/ksz8.h
@@ -17,8 +17,8 @@  u32 ksz8_get_port_addr(int port, int offset);
 void ksz8_cfg_port_member(struct ksz_device *dev, int port, u8 member);
 void ksz8_flush_dyn_mac_table(struct ksz_device *dev, int port);
 void ksz8_port_setup(struct ksz_device *dev, int port, bool cpu_port);
-void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
-void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
+int ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
+int ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
 int ksz8_r_dyn_mac_table(struct ksz_device *dev, u16 addr, u8 *mac_addr,
 			 u8 *fid, u8 *src_port, u8 *timestamp, u16 *entries);
 int ksz8_r_sta_mac_table(struct ksz_device *dev, u16 addr,
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index c79a5128235f9..f2dd75ee0e075 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -552,7 +552,7 @@  static void ksz8_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan)
 	ksz8_w_table(dev, TABLE_VLAN, addr, buf);
 }
 
-void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
+int ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
 {
 	u8 restart, speed, ctrl, link;
 	int processed = true;
@@ -674,9 +674,11 @@  void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
 	}
 	if (processed)
 		*val = data;
+
+	return 0;
 }
 
-void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
+int ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
 {
 	u8 restart, speed, ctrl, data;
 	const u16 *regs;
@@ -787,6 +789,8 @@  void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
 	default:
 		break;
 	}
+
+	return 0;
 }
 
 void ksz8_cfg_port_member(struct ksz_device *dev, int port, u8 member)
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 2b3bf1d3950c2..a4f682d3e1fe6 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -274,7 +274,7 @@  static void ksz9477_r_phy_quirks(struct ksz_device *dev, u16 addr, u16 reg,
 		*data &= ~(BMSR_ESTATEN | BMSR_ERCAP);
 }
 
-void ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
+int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
 {
 	u16 val = 0xffff;
 
@@ -322,19 +322,23 @@  void ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
 	}
 
 	*data = val;
+
+	return 0;
 }
 
-void ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
+int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
 {
 	/* No real PHY after this. */
 	if (addr >= dev->phy_port_cnt)
-		return;
+		return 0;
 
 	/* No gigabit support.  Do not write to this register. */
 	if (!dev->info->gbit_capable[addr] && reg == MII_CTRL1000)
-		return;
+		return 0;
 
 	ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val);
+
+	return 0;
 }
 
 void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member)
diff --git a/drivers/net/dsa/microchip/ksz9477.h b/drivers/net/dsa/microchip/ksz9477.h
index cd278b307b3c7..ce87e4e09ada8 100644
--- a/drivers/net/dsa/microchip/ksz9477.h
+++ b/drivers/net/dsa/microchip/ksz9477.h
@@ -16,8 +16,8 @@  u32 ksz9477_get_port_addr(int port, int offset);
 void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member);
 void ksz9477_flush_dyn_mac_table(struct ksz_device *dev, int port);
 void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port);
-void ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
-void ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
+int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
+int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
 void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr, u64 *cnt);
 void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
 		       u64 *dropped, u64 *cnt);
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 7b6d7efc0a002..099c7bf699406 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1132,8 +1132,11 @@  static int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg)
 {
 	struct ksz_device *dev = ds->priv;
 	u16 val = 0xffff;
+	int ret;
 
-	dev->dev_ops->r_phy(dev, addr, reg, &val);
+	ret = dev->dev_ops->r_phy(dev, addr, reg, &val);
+	if (ret)
+		return ret;
 
 	return val;
 }
@@ -1141,8 +1144,11 @@  static int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg)
 static int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
 {
 	struct ksz_device *dev = ds->priv;
+	int ret;
 
-	dev->dev_ops->w_phy(dev, addr, reg, val);
+	ret = dev->dev_ops->w_phy(dev, addr, reg, val);
+	if (ret)
+		return ret;
 
 	return 0;
 }
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index e3e120d659410..584850672b9a6 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -262,8 +262,8 @@  struct ksz_dev_ops {
 	void (*flush_dyn_mac_table)(struct ksz_device *dev, int port);
 	void (*port_cleanup)(struct ksz_device *dev, int port);
 	void (*port_setup)(struct ksz_device *dev, int port, bool cpu_port);
-	void (*r_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
-	void (*w_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
+	int (*r_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
+	int (*w_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
 	void (*r_mib_cnt)(struct ksz_device *dev, int port, u16 addr,
 			  u64 *cnt);
 	void (*r_mib_pkt)(struct ksz_device *dev, int port, u16 addr,
diff --git a/drivers/net/dsa/microchip/lan937x.h b/drivers/net/dsa/microchip/lan937x.h
index 4e0b1dccec270..5d78d034a62f1 100644
--- a/drivers/net/dsa/microchip/lan937x.h
+++ b/drivers/net/dsa/microchip/lan937x.h
@@ -12,8 +12,8 @@  void lan937x_port_setup(struct ksz_device *dev, int port, bool cpu_port);
 void lan937x_config_cpu_port(struct dsa_switch *ds);
 int lan937x_switch_init(struct ksz_device *dev);
 void lan937x_switch_exit(struct ksz_device *dev);
-void lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
-void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
+int lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
+int lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
 int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu);
 void lan937x_phylink_get_caps(struct ksz_device *dev, int port,
 			      struct phylink_config *config);
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index daedd2bf20c1b..7b464f1fb5d88 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -128,14 +128,14 @@  static int lan937x_internal_phy_read(struct ksz_device *dev, int addr, int reg,
 	return ksz_read16(dev, REG_VPHY_IND_DATA__2, val);
 }
 
-void lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
+int lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
 {
-	lan937x_internal_phy_read(dev, addr, reg, data);
+	return lan937x_internal_phy_read(dev, addr, reg, data);
 }
 
-void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
+int lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
 {
-	lan937x_internal_phy_write(dev, addr, reg, val);
+	return lan937x_internal_phy_write(dev, addr, reg, val);
 }
 
 static int lan937x_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)