This replaces the plain loop over the sglist array with for_each_sg()
macro which consists of sg_next() function calls. Since sparc does
select ARCH_HAS_SG_CHAIN, it is necessary to use for_each_sg() in
order to loop over each sg element. This also help find problems with
drivers that do not properly initialize their sg tables when
CONFIG_DEBUG_SG is enabled.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
Cc: linux-arch@xxxxxxxxxxxxxxx
---
* New patch from v2
arch/sparc/kernel/ldc.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index 7d3ca30..1ae5eb1 100644
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -2086,6 +2086,7 @@ int ldc_map_sg(struct ldc_channel *lp,
struct cookie_state state;
struct ldc_iommu *iommu;
int err;
+ struct scatterlist *s;
if (map_perm & ~LDC_MAP_ALL)
return -EINVAL;
@@ -2112,9 +2113,10 @@ int ldc_map_sg(struct ldc_channel *lp,
state.pte_idx = (base - iommu->page_table);
state.nc = 0;
- for (i = 0; i < num_sg; i++)
- fill_cookies(&state, page_to_pfn(sg_page(&sg[i])) << PAGE_SHIFT,
- sg[i].offset, sg[i].length);
+ for_each_sg(sg, s, num_sg, i) {
+ fill_cookies(&state, page_to_pfn(sg_page(s)) << PAGE_SHIFT,
+ s->offset, s->length);
+ }
return state.nc;
}
--
1.9.1
--
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