pci-legacy systems are not using logic_pio to managed PIO
allocations, thus the generic pci_address_to_pio won't work
when PCI_IOBASE is defined.
Override the function to use architecture implementation to
fix the problem.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 4bfb53e7d317 ("mips: add <asm-generic/io.h> including")
Reported-by: Mateusz Jończyk <mat.jonczyk@xxxxx>
Closes: https://lore.kernel.org/r/99f75c66-4c2d-45dc-a808-b5ba440c7551@xxxxxxxxxxxxxxxx/
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
---
This is a quick fix for fixes tree and stable backporting.
In long term, we should get logic_pio accept fixed mapping,
and make PCI core code aware of platforms not using vmap
for PCI_IOBASE.
---
arch/mips/pci/pci-legacy.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c
index ec2567f8efd83bff7b106cbbd9ec7a6de0308c4c..66898fd182dc1fec1d1e9ae4c908873d59777182 100644
--- a/arch/mips/pci/pci-legacy.c
+++ b/arch/mips/pci/pci-legacy.c
@@ -29,6 +29,14 @@ static LIST_HEAD(controllers);
static int pci_initialized;
+unsigned long pci_address_to_pio(phys_addr_t address)
+{
+ if (address > IO_SPACE_LIMIT)
+ return (unsigned long)-1;
+
+ return (unsigned long) address;
+}
+
/*
* We need to avoid collisions with `mirrored' VGA ports
* and other strange ISA hardware, so we always want the
---
base-commit: dab2734f8e9ecba609d66d1dd087a392a7774c04
change-id: 20250114-malta-io-fixes-85e14b1b9f8b
Best regards,
--
Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
