diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-02-24 18:55:47 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-03-01 22:21:49 -0500 |
| commit | ce70fd9a551af7424a7dace2a1ba05a7de8eae27 (patch) | |
| tree | c074d0b72237150c6657b632325917f28b1a827a /include/scsi/scsi_eh.h | |
| parent | 71bada345b33b9297e7cc9415db6328c99b554f9 (diff) | |
| download | lwn-ce70fd9a551af7424a7dace2a1ba05a7de8eae27.tar.gz lwn-ce70fd9a551af7424a7dace2a1ba05a7de8eae27.zip | |
scsi: core: Remove the cmd field from struct scsi_request
Now that each scsi_request is backed by a scsi_cmnd, there is no need to
indirect the CDB storage. Change all submitters of SCSI passthrough
requests to store the CDB information directly in the scsi_cmnd, and while
doing so allocate the full 32 bytes that cover all Linux supported SCSI
hosts instead of requiring dynamic allocation for > 16 byte CDBs. On
64-bit systems this does not change the size of the scsi_cmnd at all, while
on 32-bit systems it slightly increases it for now, but that increase will
be made up by the removal of the remaining scsi_request fields.
Link: https://lore.kernel.org/r/20220224175552.988286-4-hch@lst.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi/scsi_eh.h')
| -rw-r--r-- | include/scsi/scsi_eh.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index 468094254b3c..1ae08e81339f 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -38,10 +38,8 @@ struct scsi_eh_save { unsigned underflow; unsigned char cmd_len; unsigned char prot_op; - unsigned char *cmnd; + unsigned char cmnd[32]; struct scsi_data_buffer sdb; - /* new command support */ - unsigned char eh_cmnd[BLK_MAX_CDB]; struct scatterlist sense_sgl; }; |