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Subject[PATCH 04/14] scsi: set ->scsi_done before calling scsi_dispatch_cmd
Date
The blk-mq code path will set this to a different function, so make the
code simpler by setting it up in a legacy-request specific place.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/scsi/scsi.c | 23 +----------------------
drivers/scsi/scsi_lib.c | 20 ++++++++++++++++++++
2 files changed, 21 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index dcc43fd..d3bd6cf 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -72,8 +72,6 @@
#define CREATE_TRACE_POINTS
#include <trace/events/scsi.h>

-static void scsi_done(struct scsi_cmnd *cmd);
-
/*
* Definitions and constants.
*/
@@ -696,8 +694,6 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
}

trace_scsi_dispatch_cmd_start(cmd);
-
- cmd->scsi_done = scsi_done;
rtn = host->hostt->queuecommand(host, cmd);
if (rtn) {
trace_scsi_dispatch_cmd_error(cmd, rtn);
@@ -711,28 +707,11 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)

return rtn;
done:
- scsi_done(cmd);
+ cmd->scsi_done(cmd);
return 0;
}

/**
- * scsi_done - Invoke completion on finished SCSI command.
- * @cmd: The SCSI Command for which a low-level device driver (LLDD) gives
- * ownership back to SCSI Core -- i.e. the LLDD has finished with it.
- *
- * Description: This function is the mid-level's (SCSI Core) interrupt routine,
- * which regains ownership of the SCSI command (de facto) from a LLDD, and
- * calls blk_complete_request() for further processing.
- *
- * This function is interrupt context safe.
- */
-static void scsi_done(struct scsi_cmnd *cmd)
-{
- trace_scsi_dispatch_cmd_done(cmd);
- blk_complete_request(cmd->request);
-}
-
-/**
* scsi_finish_command - cleanup and pass command back to upper layer
* @cmd: the command
*
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 63bf844..6989b6f 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -29,6 +29,8 @@
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>

+#include <trace/events/scsi.h>
+
#include "scsi_priv.h"
#include "scsi_logging.h"

@@ -1480,6 +1482,23 @@ static void scsi_softirq_done(struct request *rq)
}
}

+/**
+ * scsi_done - Invoke completion on finished SCSI command.
+ * @cmd: The SCSI Command for which a low-level device driver (LLDD) gives
+ * ownership back to SCSI Core -- i.e. the LLDD has finished with it.
+ *
+ * Description: This function is the mid-level's (SCSI Core) interrupt routine,
+ * which regains ownership of the SCSI command (de facto) from a LLDD, and
+ * calls blk_complete_request() for further processing.
+ *
+ * This function is interrupt context safe.
+ */
+static void scsi_done(struct scsi_cmnd *cmd)
+{
+ trace_scsi_dispatch_cmd_done(cmd);
+ blk_complete_request(cmd->request);
+}
+
/*
* Function: scsi_request_fn()
*
@@ -1582,6 +1601,7 @@ static void scsi_request_fn(struct request_queue *q)
/*
* Dispatch the command to the low-level driver.
*/
+ cmd->scsi_done = scsi_done;
rtn = scsi_dispatch_cmd(cmd);
if (rtn) {
scsi_queue_insert(cmd, rtn);
--
1.7.10.4


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