5.15-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Palmer daniel@thingy.jp
[ Upstream commit 43adad382e1fdecabd2c4cd2bea777ef4ce4109e ]
When 8139too is probing and 8139TOO_PIO=y it will call pci_iomap_range() and from there __pci_ioport_map() for the PCI IO space. If HAS_IOPORT_MAP=n and NO_GENERIC_PCI_IOPORT_MAP=n, like it is on my m68k config, __pci_ioport_map() becomes NULL, pci_iomap_range() will always fail and the driver will complain it couldn't map the PIO space and return an error.
NO_IOPORT_MAP seems to cover the case where what 8139too is trying to do cannot ever work so make 8139TOO_PIO depend on being it false and avoid creating an unusable driver.
Signed-off-by: Daniel Palmer daniel@thingy.jp Link: https://patch.msgid.link/20250907064349.3427600-1-daniel@thingy.jp Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/realtek/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/realtek/Kconfig b/drivers/net/ethernet/realtek/Kconfig index 93d9df55b361a..01811924c4db4 100644 --- a/drivers/net/ethernet/realtek/Kconfig +++ b/drivers/net/ethernet/realtek/Kconfig @@ -58,7 +58,7 @@ config 8139TOO config 8139TOO_PIO bool "Use PIO instead of MMIO" default y - depends on 8139TOO + depends on 8139TOO && !NO_IOPORT_MAP help This instructs the driver to use programmed I/O ports (PIO) instead of PCI shared memory (MMIO). This can possibly solve some problems