sd/skd: stuff discard page in request->completion_data

Store the pointer to the page there, so we can always safely
reference it from end_io context where ->bio may have been
cleared.

Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index 36bcedfd930c..c48d9084c965 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -743,6 +743,7 @@ static void skd_request_fn(struct request_queue *q)
                                 break;
                         }
                         skreq->discard_page = 1;
+                        req->completion_data = page;
                         skd_prep_discard_cdb(scsi_req, skreq, page, lba, count);
 
                 } else if (flush == SKD_FLUSH_ZERO_SIZE_FIRST) {
@@ -855,10 +856,9 @@ static void skd_end_request(struct skd_device *skdev,
 
         if ((io_flags & REQ_DISCARD) &&
                 (skreq->discard_page == 1)) {
-                struct bio *bio = req->bio;
                 pr_debug("%s:%s:%d, free the page!",
                          skdev->name, __func__, __LINE__);
-                __free_page(bio->bi_io_vec->bv_page);
+                __free_page(req->completion_data);
         }
 
         if (unlikely(error)) {