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| author | Bart Van Assche <bvanassche@acm.org> | 2021-10-07 22:27:56 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-10-17 03:28:43 +0200 |
| commit | bf23e619039d360d503b7282d030daf2277a5d47 (patch) | |
| tree | 38e84bf6768eb1d613c595ea61cb2cdc0ede34de /include/scsi | |
| parent | scsi: core: pm: Only runtime resume if necessary (diff) | |
| download | linux-bf23e619039d360d503b7282d030daf2277a5d47.tar.xz linux-bf23e619039d360d503b7282d030daf2277a5d47.zip | |
scsi: core: Use a structure member to track the SCSI command submitter
Conditional statements are faster than indirect calls. Use a structure
member to track the SCSI command submitter such that later patches can call
scsi_done(scmd) instead of scmd->scsi_done(scmd).
The asymmetric behavior that scsi_send_eh_cmnd() sets the submission
context to the SCSI error handler and that it does not restore the
submission context to the SCSI core is retained.
Link: https://lore.kernel.org/r/20211007202923.2174984-2-bvanassche@acm.org
Cc: Hannes Reinecke <hare@suse.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index a2315aac93c7..893c24aab8e4 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -64,6 +64,12 @@ struct scsi_pointer { #define SCMD_STATE_COMPLETE 0 #define SCMD_STATE_INFLIGHT 1 +enum scsi_cmnd_submitter { + SUBMITTED_BY_BLOCK_LAYER = 0, + SUBMITTED_BY_SCSI_ERROR_HANDLER = 1, + SUBMITTED_BY_SCSI_RESET_IOCTL = 2, +} __packed; + struct scsi_cmnd { struct scsi_request req; struct scsi_device *device; @@ -89,6 +95,7 @@ struct scsi_cmnd { unsigned char prot_op; unsigned char prot_type; unsigned char prot_flags; + enum scsi_cmnd_submitter submitter; unsigned short cmd_len; enum dma_data_direction sc_data_direction; |