block: return -ENODEV for BLK_STS_OFFLINE

Change the user visible return value for BLK_STS_OFFLINE to -ENODEV, which
is more descriptive than existing -EIO.

Signed-off-by: Song Liu <song@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220203192827.1370270-3-song@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-core.c b/block/blk-core.c
index 24035dd..be8812f 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -164,7 +164,7 @@ static const struct {
        [BLK_STS_RESOURCE]      = { -ENOMEM,    "kernel resource" },
        [BLK_STS_DEV_RESOURCE]  = { -EBUSY,     "device resource" },
        [BLK_STS_AGAIN]         = { -EAGAIN,    "nonblocking retry" },
-       [BLK_STS_OFFLINE]       = { -EIO,       "device offline" },
+       [BLK_STS_OFFLINE]       = { -ENODEV,    "device offline" },
 
        /* device mapper special case, should not leak out: */
        [BLK_STS_DM_REQUEUE]    = { -EREMCHG, "dm internal retry" },