From: Mike Rapoport <r...@linux.ibm.com>
Until commit 92d12f9544b7 ("memblock: refactor internal allocation
functions") the maximal address for memblock allocations was forced to
memblock.current_limit only for the allocation functions returning virtual
address. The changes introduced by that commit moved the limit enforcement
into the allocation core and as a result the allocation functions returning
physical address also started to limit allocations to
memblock.current_limit.
This caused breakage of etnaviv GPU driver:
[ 3.682347] etnaviv etnaviv: bound 130000.gpu (ops gpu_ops)
[ 3.688669] etnaviv etnaviv: bound 134000.gpu (ops gpu_ops)
[ 3.695099] etnaviv etnaviv: bound 2204000.gpu (ops gpu_ops)
[ 3.700800] etnaviv-gpu 130000.gpu: model: GC2000, revision: 5108
[ 3.723013] etnaviv-gpu 130000.gpu: command buffer outside valid
memory window
[ 3.731308] etnaviv-gpu 134000.gpu: model: GC320, revision: 5007
[ 3.752437] etnaviv-gpu 134000.gpu: command buffer outside valid
memory window
[ 3.760583] etnaviv-gpu 2204000.gpu: model: GC355, revision: 1215
[ 3.766766] etnaviv-gpu 2204000.gpu: Ignoring GPU with VG and FE2.0
Restore the behaviour of memblock_phys* family so that these functions will
not enforce memblock.current_limit.
Fixes: 92d12f9544b7 ("memblock: refactor internal allocation functions")
Reported-by: Adam Ford <aford...@gmail.com>
Tested-by: Adam Ford <aford...@gmail.com> #imx6q-logicpd
Signed-off-by: Mike Rapoport <r...@linux.ibm.com>
---
mm/memblock.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/memblock.c b/mm/memblock.c
index 7d4f61a..c4b16ca 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1356,9 +1356,6 @@ static phys_addr_t __init
memblock_alloc_range_nid(phys_addr_t size,
align = SMP_CACHE_BYTES;
}
- if (end > memblock.current_limit)
- end = memblock.current_limit;
-
again:
found = memblock_find_in_range_node(size, align, start, end, nid,
flags);
@@ -1469,6 +1466,9 @@ static void * __init memblock_alloc_internal(
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, nid);
+ if (max_addr > memblock.current_limit)
+ max_addr = memblock.current_limit;
+
alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid);
/* retry allocation without lower limit */
--
2.7.4
