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419dbd5e1f
linux/arch/powerpc
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Alistair Popple 419dbd5e1f powerpc/powernv: Fix update of NVLink DMA mask 
The emulated NVLink PCI devices share the same IODA2 TCE tables but only
support a single TVT (instead of the normal two for PCI devices). This
requires the kernel to manually replace windows with either the bypass
or non-bypass window depending on what the driver has requested.

Unfortunately an incorrect optimisation was made in
pnv_pci_ioda_dma_set_mask() which caused updating of some NPU device PEs
to be skipped in certain configurations due to an incorrect assumption
that a NULL peer PE in the array indicated there were no more peers
present. This patch fixes the problem by ensuring all peer PEs are
updated.

Fixes: 5d2aa710e6 ("powerpc/powernv: Add support for Nvlink NPUs")
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-01-11 20:30:48 +11:00
..
boot powerpc/cell: Remove the Cell QPACE code 2015-12-14 20:41:50 +11:00
configs powerpc/cell: Remove the Cell QPACE code 2015-12-14 20:41:50 +11:00
crypto powerpc: Create disable_kernel_{fp,altivec,vsx,spe}() 2015-12-01 13:52:25 +11:00
include powerpc: Fix build break due to paca mm_context_t changes 2016-01-09 08:28:44 +11:00
kernel powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing 2016-01-11 14:27:28 +11:00
kvm powerpc: create flush_all_to_thread() 2015-12-02 19:34:40 +11:00
lib powerpc: Create disable_kernel_{fp,altivec,vsx,spe}() 2015-12-01 13:52:25 +11:00
math-emu powerpc: Correct emulated mtfsf instruction 2014-04-07 10:33:11 +10:00
mm powerpc: Fix build break due to paca mm_context_t changes 2016-01-09 08:28:44 +11:00
net ebpf: migrate bpf_prog's flags to bitfield 2015-10-03 05:02:39 -07:00
oprofile powerpc: Remove mtmsrd(), use existing mtmsr() 2015-07-13 15:47:28 +10:00
perf powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
platforms powerpc/powernv: Fix update of NVLink DMA mask 2016-01-11 20:30:48 +11:00
sysdev powerpc/axonram: Fix module autoload for OF platform driver 2015-11-26 22:11:18 +11:00
xmon powerpc/xmon: Use rtas_call_unlocked() in xmon 2015-12-17 22:40:55 +11:00
Kconfig powerpc/mm: Add page soft dirty tracking 2015-12-17 22:40:58 +11:00
Kconfig.debug powerpc: Fix style of self-test config prompts 2015-12-27 19:12:40 +11:00
Makefile powerpc/cell: Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU 2015-10-19 19:51:18 +11:00
relocs_check.sh powerpc: Convert relocs_check to a shell script using grep 2015-03-23 14:47:39 +11:00