From 8c07a308ec5284fe41aefe48ac2ef4cfcd71ddbf Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 24 Jun 2015 16:55:40 -0700 Subject: [PATCH] sparc: use for_each_sg() 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 Cc: "David S. Miller" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 7d3ca30fcd15..1ae5eb1bb045 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; } -- 2.20.1