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scsi: core: Move command size detection out of the fast path

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We only need to detect the command size for ioctl request from userspace,
which is limited to the passthrough path.  Move the check there instead of
doing it for all queuecommand invocations.

Link: https://lore.kernel.org/r/20201005084130.143273-4-hch@lst.de
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2020-10-05 10:41:23 +02:00 committed by Martin K. Petersen
parent 3a8dc5bbc8
commit 2ceda20f0a
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/scsi_lib.c
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@ -1181,6 +1181,8 @@ static blk_status_t scsi_setup_scsi_cmnd(struct scsi_device *sdev,
}
cmd->cmd_len = scsi_req(req)->cmd_len;
if (cmd->cmd_len == 0)
cmd->cmd_len = scsi_command_size(cmd->cmnd);
cmd->cmnd = scsi_req(req)->cmd;
cmd->transfersize = blk_rq_bytes(req);
cmd->allowed = scsi_req(req)->retries;
@ -1694,8 +1696,6 @@ static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
scsi_set_resid(cmd, 0);
memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
if (cmd->cmd_len == 0)
cmd->cmd_len = scsi_command_size(cmd->cmnd);
cmd->scsi_done = scsi_mq_done;
reason = scsi_dispatch_cmd(cmd);