mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-27 12:57:53 +00:00
Code Issues Releases Wiki Activity

powerpc/isa-bridge: Fix ISA mapping when "ranges" is not present

Browse source 
Commit e4ab08be5b ("powerpc/isa-bridge: Remove open coded "ranges"
parsing") broke PASemi Nemo board booting. The issue is the ISA I/O
range was not getting mapped as the logic to handle no "ranges" was
inverted. If phb_io_base_phys is non-zero, then the ISA range defaults
to the first 64K of the PCI I/O space. phb_io_base_phys should only be 0
when looking for a non-PCI ISA region.

Fixes: e4ab08be5b ("powerpc/isa-bridge: Remove open coded "ranges" parsing")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Link: https://lore.kernel.org/all/301595ad-0edf-2113-b55f-f5b8051ed24c@xenosoft.de/
Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230505171816.3175865-1-robh@kernel.org
This commit is contained in:
Rob Herring 2023-05-05 12:18:17 -05:00 committed by Michael Ellerman
parent ac9a78681b
commit 79de36042e
1 changed files with 3 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
arch/powerpc/kernel/isa-bridge.c
View file

@ -93,11 +93,12 @@ static int process_ISA_OF_ranges(struct device_node *isa_node,
}
inval_range:
if (!phb_io_base_phys) {
if (phb_io_base_phys) {
pr_err("no ISA IO ranges or unexpected isa range, mapping 64k\n");
remap_isa_base(phb_io_base_phys, 0x10000);
return 0;
}
return 0;
return -EINVAL;
}