[Xen-devel] [RFC PATCH 04/60] hyper_dmabuf: new index, k for pointing a right n-th page

[Dongwon Kim <dongwon.kim@xxxxxxxxx>]

Need a new index, k in hyper_dmabuf_extract_pgs function for
picking up a correct n-th page in contigous memory space.

Signed-off-by: Dongwon Kim <dongwon.kim@xxxxxxxxx>
---
 drivers/xen/hyper_dmabuf/hyper_dmabuf_imp.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_imp.c 
b/drivers/xen/hyper_dmabuf/hyper_dmabuf_imp.c
index 7cb5c35..3b40ec0 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_imp.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_imp.c
@@ -39,7 +39,7 @@ static int hyper_dmabuf_get_num_pgs(struct sg_table *sgt)
 struct hyper_dmabuf_pages_info *hyper_dmabuf_ext_pgs(struct sg_table *sgt)
 {
        struct hyper_dmabuf_pages_info *pinfo;
-       int i, j;
+       int i, j, k;
        int length;
        struct scatterlist *sgl;
 
@@ -57,7 +57,7 @@ struct hyper_dmabuf_pages_info *hyper_dmabuf_ext_pgs(struct 
sg_table *sgt)
        pinfo->frst_ofst = sgl->offset;
        pinfo->pages[0] = sg_page(sgl);
        length = sgl->length - PAGE_SIZE + sgl->offset;
-       i=1;
+       i = 1;
 
        while (length > 0) {
                pinfo->pages[i] = nth_page(sg_page(sgl), i);
@@ -71,12 +71,12 @@ struct hyper_dmabuf_pages_info *hyper_dmabuf_ext_pgs(struct 
sg_table *sgt)
                pinfo->pages[i++] = sg_page(sgl);
                length = sgl->length - PAGE_SIZE;
                pinfo->nents++;
+               k = 1;
 
                while (length > 0) {
-                       pinfo->pages[i] = nth_page(sg_page(sgl), i);
+                       pinfo->pages[i++] = nth_page(sg_page(sgl), k++);
                        length -= PAGE_SIZE;
                        pinfo->nents++;
-                       i++;
                }
        }
 
@@ -535,7 +535,8 @@ static int hyper_dmabuf_ops_attach(struct dma_buf* dmabuf, 
struct device* dev,
                printk("hyper_dmabuf::%s Error:send dmabuf sync request 
failed\n", __func__);
        }
 
-       return ret;
+       /* Ignoring ret for now */
+       return 0;
 }
 
 static void hyper_dmabuf_ops_detach(struct dma_buf* dmabuf, struct 
dma_buf_attachment *attach)
-- 
2.7.4


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