intel-agp: fix sglist allocation to avoid vmalloc()

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index b9d9886..d8c80d8 100644 (file)
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -198,39 +198,30 @@ static void intel_agp_unmap_page(struct page *page, dma_addr_t dma)
 
 static void intel_agp_free_sglist(struct agp_memory *mem)
 {
+       struct sg_table st;
+
+       st.sgl = mem->sg_list;
+       st.orig_nents = st.nents = mem->page_count;
+
+       sg_free_table(&st);
 
-       if (mem->sg_vmalloc_flag)
-               vfree(mem->sg_list);
-       else
-               kfree(mem->sg_list);
-       mem->sg_vmalloc_flag = 0;
        mem->sg_list = NULL;
        mem->num_sg = 0;
 }
 
 static int intel_agp_map_memory(struct agp_memory *mem)
 {
+       struct sg_table st;
        struct scatterlist *sg;
        int i;
 
        DBG("try mapping %lu pages\n", (unsigned long)mem->page_count);
 
-       if ((mem->page_count * sizeof(*mem->sg_list)) < 2*PAGE_SIZE)
-               mem->sg_list = kcalloc(mem->page_count, sizeof(*mem->sg_list),
-                                      GFP_KERNEL);
-
-       if (mem->sg_list == NULL) {
-               mem->sg_list = vmalloc(mem->page_count * sizeof(*mem->sg_list));
-               mem->sg_vmalloc_flag = 1;
-       }
-
-       if (!mem->sg_list) {
-               mem->sg_vmalloc_flag = 0;
+       if (sg_alloc_table(&st, mem->page_count, GFP_KERNEL))
                return -ENOMEM;
-       }
-       sg_init_table(mem->sg_list, mem->page_count);
 
-       sg = mem->sg_list;
+       mem->sg_list = sg = st.sgl;
+
        for (i = 0 ; i < mem->page_count; i++, sg = sg_next(sg))
                sg_set_page(sg, mem->pages[i], PAGE_SIZE, 0);
 

diff --git a/include/linux/agp_backend.h b/include/linux/agp_backend.h
index 8a294d6..880130f 100644 (file)
--- a/include/linux/agp_backend.h
+++ b/include/linux/agp_backend.h
@@ -80,7 +80,6 @@ struct agp_memory {
        bool is_bound;
        bool is_flushed;
        bool vmalloc_flag;
-       bool sg_vmalloc_flag;
        /* list of agp_memory mapped to the aperture */
        struct list_head mapped_list;
        /* DMA-mapped addresses */