forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

MIPS: loongson64: fix bug when PAGE_SIZE > 16KB

Browse source 
[ Upstream commit 509d36a941 ]

When page size larger than 16KB, arguments "vaddr + size(16KB)" in
"ioremap_page_range(vaddr, vaddr + size,...)" called by
"add_legacy_isa_io" is not page-aligned.

As loongson64 needs at least page size 16KB to get rid of cache alias,
and "vaddr" is 64KB-aligned, and 64KB is largest page size supported,
rounding "size" up to PAGE_SIZE is enough for all page size supported.

Fixes: 6d0068ad15 ("MIPS: Loongson64: Process ISA Node in DeviceTree")
Signed-off-by: Huang Pei <huangpei@loongson.cn>
Acked-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Huang Pei 2021-03-24 11:24:51 +08:00 • committed by Greg Kroah-Hartman
commit 0f69f9596b
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
arch/mips/loongson64/init.c
View file

@ -82,7 +82,7 @@ static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_
return -ENOMEM;
range->fwnode = fwnode;
range->size = size;
range->size = size = round_up(size, PAGE_SIZE);
range->hw_start = hw_start;
range->flags = LOGIC_PIO_CPU_MMIO;