dm log writes: fix bug with too large bios

[firefly-linux-kernel-4.4.55.git] / drivers / md / dm-log-writes.c

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index d8956b4a7b09c78f88223bcaf7c1571c69c2ea16..c8b513ee117c9cd9b7e5e0e18efbc2611a9cba7c 100644 (file)
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -259,7 +259,7 @@ static int log_one_block(struct log_writes_c *lc,
        sector++;
 
        atomic_inc(&lc->io_blocks);
-       bio = bio_alloc(GFP_KERNEL, block->vec_cnt);
+       bio = bio_alloc(GFP_KERNEL, min(block->vec_cnt, BIO_MAX_PAGES));
        if (!bio) {
                DMERR("Couldn't alloc log bio");
                goto error;
@@ -280,7 +280,7 @@ static int log_one_block(struct log_writes_c *lc,
                if (ret != block->vecs[i].bv_len) {
                        atomic_inc(&lc->io_blocks);
                        submit_bio(WRITE, bio);
-                       bio = bio_alloc(GFP_KERNEL, block->vec_cnt - i);
+                       bio = bio_alloc(GFP_KERNEL, min(block->vec_cnt - i, BIO_MAX_PAGES));
                        if (!bio) {
                                DMERR("Couldn't alloc log bio");
                                goto error;