diff mbox series

[net-next,v1,12/21] net: usb: lan78xx: Add error handling to lan78xx_init_mac_address

Message ID 20241203072154.2440034-13-o.rempel@pengutronix.de (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series lan78xx: Preparations for PHYlink | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 4 this patch: 4
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: linux-usb@vger.kernel.org
netdev/build_clang success Errors and warnings before: 5 this patch: 5
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 No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 307 this patch: 307
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 62 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Oleksij Rempel Dec. 3, 2024, 7:21 a.m. UTC 
Convert `lan78xx_init_mac_address` to return error codes and handle
failures in register read and write operations. Update `lan78xx_reset`
to check for errors during MAC address initialization and propagate them
appropriately.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/net/usb/lan78xx.c | 36 ++++++++++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 070b21baffaf..26dc43bac84b 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2153,13 +2153,19 @@  static const struct ethtool_ops lan78xx_ethtool_ops = {
 	.get_regs	= lan78xx_get_regs,
 };
 
-static void lan78xx_init_mac_address(struct lan78xx_net *dev)
+static int lan78xx_init_mac_address(struct lan78xx_net *dev)
 {
 	u32 addr_lo, addr_hi;
 	u8 addr[6];
+	int ret;
+
+	ret = lan78xx_read_reg(dev, RX_ADDRL, &addr_lo);
+	if (ret < 0)
+		return ret;
 
-	lan78xx_read_reg(dev, RX_ADDRL, &addr_lo);
-	lan78xx_read_reg(dev, RX_ADDRH, &addr_hi);
+	ret = lan78xx_read_reg(dev, RX_ADDRH, &addr_hi);
+	if (ret < 0)
+		return ret;
 
 	addr[0] = addr_lo & 0xFF;
 	addr[1] = (addr_lo >> 8) & 0xFF;
@@ -2192,14 +2198,26 @@  static void lan78xx_init_mac_address(struct lan78xx_net *dev)
 			  (addr[2] << 16) | (addr[3] << 24);
 		addr_hi = addr[4] | (addr[5] << 8);
 
-		lan78xx_write_reg(dev, RX_ADDRL, addr_lo);
-		lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
+		ret = lan78xx_write_reg(dev, RX_ADDRL, addr_lo);
+		if (ret < 0)
+			return ret;
+
+		ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
+		if (ret < 0)
+			return ret;
 	}
 
-	lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
-	lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
+	ret = lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
+	if (ret < 0)
+		return ret;
 
 	eth_hw_addr_set(dev->net, addr);
+
+	return 0;
 }
 
 /* MDIO read and write wrappers for phylib */
@@ -2990,7 +3008,9 @@  static int lan78xx_reset(struct lan78xx_net *dev)
 		}
 	} while (buf & HW_CFG_LRST_);
 
-	lan78xx_init_mac_address(dev);
+	ret = lan78xx_init_mac_address(dev);
+	if (ret < 0)
+		return ret;
 
 	/* save DEVID for later usage */
 	ret = lan78xx_read_reg(dev, ID_REV, &buf);