block: drbd: drbd_nl: Make conversion to 'enum drbd_ret_code' explicit

[Lee Jones]

From: Lee Jones <lee.jones at linaro.org>

commit 1f1e87b4dc4598eac57a69868534b92d65e47e82 upstream.

Fixes the following W=1 kernel build warning(s):

 from drivers/block/drbd/drbd_nl.c:24:
 drivers/block/drbd/drbd_nl.c: In function ‘drbd_adm_set_role’:
 drivers/block/drbd/drbd_nl.c:793:11: warning: implicit conversion from ‘enum drbd_state_rv’ to ‘enum drbd_ret_code’ [-Wenum-conversion]
 drivers/block/drbd/drbd_nl.c:795:11: warning: implicit conversion from ‘enum drbd_state_rv’ to ‘enum drbd_ret_code’ [-Wenum-conversion]
 drivers/block/drbd/drbd_nl.c: In function ‘drbd_adm_attach’:
 drivers/block/drbd/drbd_nl.c:1965:10: warning: implicit conversion from ‘enum drbd_state_rv’ to ‘enum drbd_ret_code’ [-Wenum-conversion]
 drivers/block/drbd/drbd_nl.c: In function ‘drbd_adm_connect’:
 drivers/block/drbd/drbd_nl.c:2690:10: warning: implicit conversion from ‘enum drbd_state_rv’ to ‘enum drbd_ret_code’ [-Wenum-conversion]
 drivers/block/drbd/drbd_nl.c: In function ‘drbd_adm_disconnect’:
 drivers/block/drbd/drbd_nl.c:2803:11: warning: implicit conversion from ‘enum drbd_state_rv’ to ‘enum drbd_ret_code’ [-Wenum-conversion]

Cc: Philipp Reisner <philipp.reisner at linbit.com>
Cc: Lars Ellenberg <lars.ellenberg at linbit.com>
Cc: Jens Axboe <axboe at kernel.dk>
Cc: drbd-dev at lists.linbit.com
Cc: linux-block at vger.kernel.org
Signed-off-by: Lee Jones <lee.jones at linaro.org>
Link: https://lore.kernel.org/r/20210312105530.2219008-8-lee.jones@linaro.org
Signed-off-by: Jens Axboe <axboe at kernel.dk>
Cc: Nathan Chancellor <nathan at kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 drivers/block/drbd/drbd_nl.c |   13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -774,9 +774,11 @@ int drbd_adm_set_role(struct sk_buff *sk
 	mutex_lock(&adm_ctx.resource->adm_mutex);
 
 	if (info->genlhdr->cmd == DRBD_ADM_PRIMARY)
-		retcode = drbd_set_role(adm_ctx.device, R_PRIMARY, parms.assume_uptodate);
+		retcode = (enum drbd_ret_code)drbd_set_role(adm_ctx.device,
+						R_PRIMARY, parms.assume_uptodate);
 	else
-		retcode = drbd_set_role(adm_ctx.device, R_SECONDARY, 0);
+		retcode = (enum drbd_ret_code)drbd_set_role(adm_ctx.device,
+						R_SECONDARY, 0);
 
 	mutex_unlock(&adm_ctx.resource->adm_mutex);
 	genl_lock();
@@ -1933,7 +1935,7 @@ int drbd_adm_attach(struct sk_buff *skb,
 	drbd_flush_workqueue(&connection->sender_work);
 
 	rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE);
-	retcode = rv;  /* FIXME: Type mismatch. */
+	retcode = (enum drbd_ret_code)rv;
 	drbd_resume_io(device);
 	if (rv < SS_SUCCESS)
 		goto fail;
@@ -2684,7 +2686,8 @@ int drbd_adm_connect(struct sk_buff *skb
 	}
 	rcu_read_unlock();
 
-	retcode = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE);
+	retcode = (enum drbd_ret_code)conn_request_state(connection,
+					NS(conn, C_UNCONNECTED), CS_VERBOSE);
 
 	conn_reconfig_done(connection);
 	mutex_unlock(&adm_ctx.resource->adm_mutex);
@@ -2790,7 +2793,7 @@ int drbd_adm_disconnect(struct sk_buff *
 	mutex_lock(&adm_ctx.resource->adm_mutex);
 	rv = conn_try_disconnect(connection, parms.force_disconnect);
 	if (rv < SS_SUCCESS)
-		retcode = rv;  /* FIXME: Type mismatch. */
+		retcode = (enum drbd_ret_code)rv;
 	else
 		retcode = NO_ERROR;
 	mutex_unlock(&adm_ctx.resource->adm_mutex);


Patches currently in stable-queue which might be from lee.jones at linaro.org are

queue-4.9/block-drbd-drbd_nl-make-conversion-to-enum-drbd_ret_code-explicit.patch