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Michael Ellerman 8a7c008c64 of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc 
commit dabf6b36b8 upstream.

There's an OF helper called of_dma_is_coherent(), which checks if a
device has a "dma-coherent" property to see if the device is coherent
for DMA.

But on some platforms devices are coherent by default, and on some
platforms it's not possible to update existing device trees to add the
"dma-coherent" property.

So add a Kconfig symbol to allow arch code to tell
of_dma_is_coherent() that devices are coherent by default, regardless
of the presence of the property.

Select that symbol on powerpc when NOT_COHERENT_CACHE is not set, ie.
when the system has a coherent cache.

Fixes: 92ea637ede ("of: introduce of_dma_is_coherent() helper")
Cc: stable@vger.kernel.org # v3.16+
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-11 04:34:03 -08:00
..
alpha
arc arc: eznps: fix allmodconfig kconfig warning 2020-02-01 09:37:06 +00:00
arm KVM: arm64: Only sign-extend MMIO up to register width 2020-02-11 04:33:58 -08:00
arm64 KVM: arm64: Only sign-extend MMIO up to register width 2020-02-11 04:33:58 -08:00
c6x
h8300
hexagon
ia64 mm/memory_hotplug: shrink zones when offlining memory 2020-01-29 16:43:27 +01:00
m68k m68k: Call timer_interrupt() with interrupts disabled 2020-01-27 14:51:23 +01:00
microblaze
mips MIPS: boot: fix typo in 'vmlinux.lzma.its' target 2020-02-11 04:33:58 -08:00
nds32
nios2 nios2: ksyms: Add missing symbol exports 2020-01-27 14:50:30 +01:00
openrisc
parisc parisc: Use proper printk format for resource_size_t 2020-02-05 14:43:45 +00:00
powerpc of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc 2020-02-11 04:34:03 -08:00
riscv riscv: delete temporary files 2020-02-05 14:43:48 +00:00
s390 s390/mm: fix dynamic pagetable upgrade for hugetlbfs 2020-02-11 04:33:58 -08:00
sh mm/memory_hotplug: shrink zones when offlining memory 2020-01-29 16:43:27 +01:00
sparc sparc32: fix struct ipc64_perm type definition 2020-02-11 04:33:52 -08:00
um um: Fix off by one error in IRQ enumeration 2020-01-27 14:51:13 +01:00
unicore32
x86 x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR 2020-02-11 04:33:51 -08:00
xtensa
.gitignore
Kconfig