diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2019-12-12 16:34:03 +0800 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2019-12-12 16:34:33 +0800 |
| commit | e32ea127d81c12882f39c2783d78634597ff21a2 (patch) | |
| tree | a6377ed4cb0d5f79f251a803a94198dfb8686fa6 /arch/nios2/mm | |
| parent | e42617b825f8073569da76dc4510bfa019b1c35a (diff) | |
nios2: Fix ioremap
Commit 5ace77e0b41a ("nios2: remove __ioremap") removed the following code,
with the argument that cacheflag is always 0 and the expression would
therefore always be false.
if (IS_MAPPABLE_UNCACHEABLE(phys_addr) &&
IS_MAPPABLE_UNCACHEABLE(last_addr) &&
!(cacheflag & _PAGE_CACHED))
return (void __iomem *)(CONFIG_NIOS2_IO_REGION_BASE + phys_addr);
This did not take the "!" in the expression into account. Result is that
nios2 images no longer boot. Restoring the removed code fixes the problem.
Fixes: 5ace77e0b41a ("nios2: remove __ioremap")
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Diffstat (limited to 'arch/nios2/mm')
| -rw-r--r-- | arch/nios2/mm/ioremap.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/nios2/mm/ioremap.c b/arch/nios2/mm/ioremap.c index b56af759dcdf..819bdfcc2e71 100644 --- a/arch/nios2/mm/ioremap.c +++ b/arch/nios2/mm/ioremap.c @@ -138,6 +138,14 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size) return NULL; } + /* + * Map uncached objects in the low part of address space to + * CONFIG_NIOS2_IO_REGION_BASE + */ + if (IS_MAPPABLE_UNCACHEABLE(phys_addr) && + IS_MAPPABLE_UNCACHEABLE(last_addr)) + return (void __iomem *)(CONFIG_NIOS2_IO_REGION_BASE + phys_addr); + /* Mappings have to be page-aligned */ offset = phys_addr & ~PAGE_MASK; phys_addr &= PAGE_MASK; |