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| 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 /drivers/ata | |
| parent | scsi: core: Don't memset() the entire scsi_cmnd in scsi_init_command() (diff) | |
| download | linux-dev-ce70fd9a551af7424a7dace2a1ba05a7de8eae27.tar.xz linux-dev-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 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index ed8be585a98f..c8283bd4ffd1 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1022,7 +1022,9 @@ void ata_scsi_sdev_config(struct scsi_device *sdev) */ bool ata_scsi_dma_need_drain(struct request *rq) { - return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); + + return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; } EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); |