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authorSayanta Pattanayak <sayanta.pattanayak@arm.com>2021-07-20 17:17:40 +0100
committerDavid S. Miller <davem@davemloft.net>2021-07-21 07:54:30 -0700
commite9a72f874d5b95cef0765bafc56005a50f72c5fe (patch)
tree2b235dcaccaaebf5464fc822ee4ce36168212aea
parent09cfae9f13d51700b0fecf591dcd658fc5375428 (diff)
r8169: Avoid duplicate sysfs entry creation error
When registering the MDIO bus for a r8169 device, we use the PCI bus/device specifier as a (seemingly) unique device identifier. However the very same BDF number can be used on another PCI segment, which makes the driver fail probing: [ 27.544136] r8169 0002:07:00.0: enabling device (0000 -> 0003) [ 27.559734] sysfs: cannot create duplicate filename '/class/mdio_bus/r8169-700' .... [ 27.684858] libphy: mii_bus r8169-700 failed to register [ 27.695602] r8169: probe of 0002:07:00.0 failed with error -22 Add the segment number to the device name to make it more unique. This fixes operation on ARM N1SDP boards, with two boards connected together to form an SMP system, and all on-board devices showing up twice, just on different PCI segments. A similar issue would occur on large systems with many PCI slots and multiple RTL8169 NICs. Fixes: f1e911d5d0dfd ("r8169: add basic phylib support") Signed-off-by: Sayanta Pattanayak <sayanta.pattanayak@arm.com> [Andre: expand commit message, use pci_domain_nr()] Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/realtek/r8169_main.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index f744557c33a3..c7af5bc3b8af 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -5084,7 +5084,8 @@ static int r8169_mdio_register(struct rtl8169_private *tp)
new_bus->priv = tp;
new_bus->parent = &pdev->dev;
new_bus->irq[0] = PHY_MAC_INTERRUPT;
- snprintf(new_bus->id, MII_BUS_ID_SIZE, "r8169-%x", pci_dev_id(pdev));
+ snprintf(new_bus->id, MII_BUS_ID_SIZE, "r8169-%x-%x",
+ pci_domain_nr(pdev->bus), pci_dev_id(pdev));
new_bus->read = r8169_mdio_read_reg;
new_bus->write = r8169_mdio_write_reg;