[PATCH 06/45] dm: use op_is_write instead of checking for REQ_WRITE

[mchristi at redhat.com]

From: Mike Christie <mchristi at redhat.com>

We currently set REQ_WRITE/WRITE for all non READ IOs
like discard, flush, writesame, etc. In the next patches where we
no longer set up the op as a bitmap, we will not be able to
detect a operation direction like writesame by testing if REQ_WRITE is
set.

This has dm use the op_is_write helper which will do the right
thing.

Signed-off-by: Mike Christie <mchristi at redhat.com>
---
 drivers/md/dm-io.c     | 4 ++--
 drivers/md/dm-kcopyd.c | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 50f17e3..26e9a85 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -409,7 +409,7 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
 	struct io *io;
 	struct sync_io sio;
 
-	if (num_regions > 1 && (rw & RW_MASK) != WRITE) {
+	if (num_regions > 1 && !op_is_write(rw)) {
 		WARN_ON(1);
 		return -EIO;
 	}
@@ -442,7 +442,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions,
 {
 	struct io *io;
 
-	if (num_regions > 1 && (rw & RW_MASK) != WRITE) {
+	if (num_regions > 1 && !op_is_write(rw)) {
 		WARN_ON(1);
 		fn(1, context);
 		return -EIO;
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index 1452ed9..9f390e4 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -465,7 +465,7 @@ static void complete_io(unsigned long error, void *context)
 	io_job_finish(kc->throttle);
 
 	if (error) {
-		if (job->rw & WRITE)
+		if (op_is_write(job->rw))
 			job->write_err |= error;
 		else
 			job->read_err = 1;
@@ -477,7 +477,7 @@ static void complete_io(unsigned long error, void *context)
 		}
 	}
 
-	if (job->rw & WRITE)
+	if (op_is_write(job->rw))
 		push(&kc->complete_jobs, job);
 
 	else {
@@ -550,7 +550,7 @@ static int process_jobs(struct list_head *jobs, struct dm_kcopyd_client *kc,
 
 		if (r < 0) {
 			/* error this rogue job */
-			if (job->rw & WRITE)
+			if (op_is_write(job->rw))
 				job->write_err = (unsigned long) -1L;
 			else
 				job->read_err = 1;
-- 
2.7.2