linux-kernel - [PATCH v2] block: Add default switch case to blk_pm_allow

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Message-Id: <1520005999-13679-1-git-send-email-geert+renesas@glider.be>
Date:   Fri,  2 Mar 2018 16:53:19 +0100
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v2] block: Add default switch case to blk_pm_allow_request() to kill warning

With gcc 4.9.0:

    block/blk-core.c: In function 'blk_pm_allow_request':
    block/blk-core.c:2653:2: warning: enumeration value 'RPM_ACTIVE' not handled in switch [-Wswitch]
      switch (rq->q->rpm_status) {
      ^

Convert the return statement below the switch() block into a default
case to fix this.

Fixes: e4f36b249b4d4e75 ("block: fix peeking requests during PM")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Christoph Hellwig <hch@....de>
---
v2:
  - Add Reviewed-by,
  - Update line number.
---
 block/blk-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 2d1a7bbe063437bf..81d2928ce4e9d370 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2656,9 +2656,9 @@ static bool blk_pm_allow_request(struct request *rq)
 		return rq->rq_flags & RQF_PM;
 	case RPM_SUSPENDED:
 		return false;
+	default:
+		return true;
 	}
-
-	return true;
 }
 #else
 static bool blk_pm_allow_request(struct request *rq)
-- 
2.7.4