Messages in this thread Patch in this message | | | From | Evan Green <> | Subject | [PATCH v4 1/2] loop: Report EOPNOTSUPP properly | Date | Thu, 2 May 2019 10:44:08 -0700 |
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Properly plumb out EOPNOTSUPP from loop driver operations, which may get returned when for instance a discard operation is attempted but not supported by the underlying block device. Before this change, everything was reported in the log as an I/O error, which is scary and not helpful in debugging.
Signed-off-by: Evan Green <evgreen@chromium.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> ---
Changes in v4: None Changes in v3: - Updated tags
Changes in v2: - Unnested error if statement (Bart)
drivers/block/loop.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index bf1c61cab8eb..bbf21ebeccd3 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -458,7 +458,9 @@ static void lo_complete_rq(struct request *rq) if (!cmd->use_aio || cmd->ret < 0 || cmd->ret == blk_rq_bytes(rq) || req_op(rq) != REQ_OP_READ) { - if (cmd->ret < 0) + if (cmd->ret == -EOPNOTSUPP) + ret = BLK_STS_NOTSUPP; + else if (cmd->ret < 0) ret = BLK_STS_IOERR; goto end_io; } @@ -1892,7 +1894,10 @@ static void loop_handle_cmd(struct loop_cmd *cmd) failed: /* complete non-aio request */ if (!cmd->use_aio || ret) { - cmd->ret = ret ? -EIO : 0; + if (ret == -EOPNOTSUPP) + cmd->ret = ret; + else + cmd->ret = ret ? -EIO : 0; blk_mq_complete_request(rq); } } -- 2.20.1
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