Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[cascardo/linux.git] / drivers / infiniband / core / umem.c
index c68746c..224ad27 100644 (file)
@@ -94,6 +94,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
        unsigned long dma_attrs = 0;
        struct scatterlist *sg, *sg_list_start;
        int need_release = 0;
+       unsigned int gup_flags = FOLL_WRITE;
 
        if (dmasync)
                dma_attrs |= DMA_ATTR_WRITE_BARRIER;
@@ -183,6 +184,9 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
        if (ret)
                goto out;
 
+       if (!umem->writable)
+               gup_flags |= FOLL_FORCE;
+
        need_release = 1;
        sg_list_start = umem->sg_head.sgl;
 
@@ -190,7 +194,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
                ret = get_user_pages(cur_base,
                                     min_t(unsigned long, npages,
                                           PAGE_SIZE / sizeof (struct page *)),
-                                    1, !umem->writable, page_list, vma_list);
+                                    gup_flags, page_list, vma_list);
 
                if (ret < 0)
                        goto out;