block: don't access bio->bi_error after bio_put()

[cascardo/linux.git] / drivers / md / dm-io.c

diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 74adcd2..c84714f 100644 (file)
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -134,12 +134,13 @@ static void dec_count(struct io *io, unsigned int region, int error)
                complete_io(io);
 }
 
-static void endio(struct bio *bio, int error)
+static void endio(struct bio *bio)
 {
        struct io *io;
        unsigned region;
+       int error;
 
-       if (error && bio_data_dir(bio) == READ)
+       if (bio->bi_error && bio_data_dir(bio) == READ)
                zero_fill_bio(bio);
 
        /*
@@ -147,6 +148,7 @@ static void endio(struct bio *bio, int error)
         */
        retrieve_io_and_region_from_bio(bio, &io, &region);
 
+       error = bio->bi_error;
        bio_put(bio);
 
        dec_count(io, region, error);