[PATCH V4 6/6] null_blk: create a helper for req completion

[Chaitanya Kulkarni]

This patch creates a helper function for handling the request
completion in the null_handle_cmd().

Reviewed-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulka...@wdc.com>
---
 drivers/block/null_blk_main.c | 49 +++++++++++++++++++----------------
 1 file changed, 27 insertions(+), 22 deletions(-)

diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index bf40c3115bb9..b26a178d064d 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -1182,6 +1182,32 @@ static inline blk_status_t 
null_handle_memory_backed(struct nullb_cmd *cmd,
        return errno_to_blk_status(err);
 }
 
+static inline void nullb_complete_cmd(struct nullb_cmd *cmd)
+{
+       /* Complete IO by inline, softirq or timer */
+       switch (cmd->nq->dev->irqmode) {
+       case NULL_IRQ_SOFTIRQ:
+               switch (cmd->nq->dev->queue_mode) {
+               case NULL_Q_MQ:
+                       blk_mq_complete_request(cmd->rq);
+                       break;
+               case NULL_Q_BIO:
+                       /*
+                        * XXX: no proper submitting cpu information available.
+                        */
+                       end_cmd(cmd);
+                       break;
+               }
+               break;
+       case NULL_IRQ_NONE:
+               end_cmd(cmd);
+               break;
+       case NULL_IRQ_TIMER:
+               null_cmd_end_timer(cmd);
+               break;
+       }
+}
+
 static blk_status_t null_handle_cmd(struct nullb_cmd *cmd, sector_t sector,
                                    sector_t nr_sectors, enum req_opf op)
 {
@@ -1213,28 +1239,7 @@ static blk_status_t null_handle_cmd(struct nullb_cmd 
*cmd, sector_t sector,
                cmd->error = null_handle_zoned(cmd, op, sector, nr_sectors);
 
 out:
-       /* Complete IO by inline, softirq or timer */
-       switch (dev->irqmode) {
-       case NULL_IRQ_SOFTIRQ:
-               switch (dev->queue_mode)  {
-               case NULL_Q_MQ:
-                       blk_mq_complete_request(cmd->rq);
-                       break;
-               case NULL_Q_BIO:
-                       /*
-                        * XXX: no proper submitting cpu information available.
-                        */
-                       end_cmd(cmd);
-                       break;
-               }
-               break;
-       case NULL_IRQ_NONE:
-               end_cmd(cmd);
-               break;
-       case NULL_IRQ_TIMER:
-               null_cmd_end_timer(cmd);
-               break;
-       }
+       nullb_complete_cmd(cmd);
        return BLK_STS_OK;
 }
 
-- 
2.17.0