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| author | Keith Busch <keith.busch@intel.com> | 2018-11-26 17:54:29 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-26 18:34:26 +0100 |
| commit | f1342709d18af97b0e71449d5696b8873d1a456c (patch) | |
| tree | bb820e311b26912b1eef37a53573d52fea6dfeb1 /include/scsi | |
| parent | blk-mq: Return true if request was completed (diff) | |
| download | linux-f1342709d18af97b0e71449d5696b8873d1a456c.tar.xz linux-f1342709d18af97b0e71449d5696b8873d1a456c.zip | |
scsi: Do not rely on blk-mq for double completions
The scsi timeout error handling had been directly updating the block
layer's request state to prevent a error handling and a natural completion
from completing the same request twice. Fix this layering violation
by having scsi control the fate of its commands with scsi owned flags
rather than use blk-mq's.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index d6fd2aba0380..3de905e205ce 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -61,6 +61,9 @@ struct scsi_pointer { /* flags preserved across unprep / reprep */ #define SCMD_PRESERVED_FLAGS (SCMD_UNCHECKED_ISA_DMA | SCMD_INITIALIZED) +/* for scmd->state */ +#define SCMD_STATE_COMPLETE (1 << 0) + struct scsi_cmnd { struct scsi_request req; struct scsi_device *device; @@ -145,6 +148,7 @@ struct scsi_cmnd { int result; /* Status code from lower level driver */ int flags; /* Command flags */ + unsigned long state; /* Command completion state */ unsigned char tag; /* SCSI-II queued command tag */ }; |