Merge branch 'develop-3.0' of ssh://10.10.10.29/rk/kernel into develop-3.0

[firefly-linux-kernel-4.4.55.git] / block / blk-map.c

diff --git a/block/blk-map.c b/block/blk-map.c
index 267a57b770994eb150d12597a4c670a9a3c5a508..e663ac2d8e68f70ff17ce274f3cebec16c1dd18c 100644 (file)
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -54,7 +54,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
         * direct dma. else, set up kernel bounce buffers
         */
        uaddr = (unsigned long) ubuf;
-       if (blk_rq_aligned(q, ubuf, len) && !map_data)
+       if (blk_rq_aligned(q, uaddr, len) && !map_data)
                bio = bio_map_user(q, NULL, uaddr, len, reading, gfp_mask);
        else
                bio = bio_copy_user(q, map_data, uaddr, len, reading, gfp_mask);
@@ -201,12 +201,13 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
        for (i = 0; i < iov_count; i++) {
                unsigned long uaddr = (unsigned long)iov[i].iov_base;
 
+               if (!iov[i].iov_len)
+                       return -EINVAL;
+
                if (uaddr & queue_dma_alignment(q)) {
                        unaligned = 1;
                        break;
                }
-               if (!iov[i].iov_len)
-                       return -EINVAL;
        }
 
        if (unaligned || (q->dma_pad_mask & len) || map_data)
@@ -290,6 +291,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
                    unsigned int len, gfp_t gfp_mask)
 {
        int reading = rq_data_dir(rq) == READ;
+       unsigned long addr = (unsigned long) kbuf;
        int do_copy = 0;
        struct bio *bio;
        int ret;
@@ -299,7 +301,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
        if (!len || !kbuf)
                return -EINVAL;
 
-       do_copy = !blk_rq_aligned(q, kbuf, len) || object_is_on_stack(kbuf);
+       do_copy = !blk_rq_aligned(q, addr, len) || object_is_on_stack(kbuf);
        if (do_copy)
                bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading);
        else