cciss: fix residual count for block pc requests
We must complete the full request, so store the request count and then set
the ->data_len to the residual count from the hardware.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 5d0e135..f15b177 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1287,6 +1287,7 @@
{
CommandList_struct *cmd = rq->completion_data;
ctlr_info_t *h = hba[cmd->ctlr];
+ unsigned int nr_bytes;
unsigned long flags;
u64bit temp64;
int i, ddir;
@@ -1308,7 +1309,14 @@
printk("Done with %p\n", rq);
#endif /* CCISS_DEBUG */
- if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, blk_rq_bytes(rq)))
+ /*
+ * Store the full size and set the residual count for pc requests
+ */
+ nr_bytes = blk_rq_bytes(rq);
+ if (blk_pc_request(rq))
+ rq->data_len = cmd->err_info->ResidualCnt;
+
+ if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, nr_bytes))
BUG();
spin_lock_irqsave(&h->lock, flags);
