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Correct sg_next_inline() misuse.

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Previously sg_next_inline() didn't check if this sg is last.



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4822 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2013-03-27 01:12:02 +00:00
parent 51fabc1228
commit ef5fe3dcd0
3 changed files with 16 additions and 8 deletions
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scst/include/scst.h
+11 -3
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@@ -3756,7 +3756,7 @@ static inline void sg_set_page(struct scatterlist *sg, struct page *page,
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) */
static inline struct scatterlist *sg_next_inline(struct scatterlist *sg)
static inline struct scatterlist *__sg_next_inline(struct scatterlist *sg)
{
sg++;
if (unlikely(sg_is_chain(sg)))
@@ -3765,6 +3765,14 @@ static inline struct scatterlist *sg_next_inline(struct scatterlist *sg)
return sg;
}
static inline struct scatterlist *sg_next_inline(struct scatterlist *sg)
{
if (sg_is_last(sg))
return NULL;
return __sg_next_inline(sg);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)
#ifndef __BACKPORT_LINUX_SCATTERLIST_H_TO_2_6_23__
@@ -3822,7 +3830,7 @@ static inline int __scst_get_buf(struct scst_cmd *cmd, int sg_cnt,
res = sg->length;
cmd->get_sg_buf_entry_num++;
cmd->get_sg_buf_cur_sg_entry = sg_next_inline(sg);
cmd->get_sg_buf_cur_sg_entry = __sg_next_inline(sg);
out:
return res;
@@ -3924,7 +3932,7 @@ static inline int __scst_get_sg_page(struct scst_cmd *cmd, int sg_cnt,
res = sg->length;
cmd->get_sg_buf_entry_num++;
cmd->get_sg_buf_cur_sg_entry = sg_next_inline(sg);
cmd->get_sg_buf_cur_sg_entry = __sg_next_inline(sg);
out:
return res;