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| author | James Bottomley <JBottomley@Parallels.com> | 2014-07-03 19:17:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-07 16:53:51 -0700 |
| commit | 019c805ef259da95d563a562d5696ca4cd334177 (patch) | |
| tree | 1003bdd42f3034c2d02de0831be3f1d4fd88247c | |
| parent | ad8c82fdabd3cb1d0bb9c5f4ec24be29ee174383 (diff) | |
| download | lwn-019c805ef259da95d563a562d5696ca4cd334177.tar.gz lwn-019c805ef259da95d563a562d5696ca4cd334177.zip | |
scsi: handle flush errors properly
commit 89fb4cd1f717a871ef79fa7debbe840e3225cd54 upstream.
Flush commands don't transfer data and thus need to be special cased
in the I/O completion handler so that we can propagate errors to
the block layer and filesystem.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Reported-by: Steven Haber <steven@qumulo.com>
Tested-by: Steven Haber <steven@qumulo.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 9db097a28a74..d99ab3bfaaee 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -806,6 +806,14 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) scsi_next_command(cmd); return; } + } else if (blk_rq_bytes(req) == 0 && result && !sense_deferred) { + /* + * Certain non BLOCK_PC requests are commands that don't + * actually transfer anything (FLUSH), so cannot use + * good_bytes != blk_rq_bytes(req) as the signal for an error. + * This sets the error explicitly for the problem case. + */ + error = __scsi_error_from_host_byte(cmd, result); } /* no bidi support for !REQ_TYPE_BLOCK_PC yet */ |