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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/[email protected]
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
This commit is contained in:
Christoph Hellwig authored and Martin K. Petersen committed 2020-10-07 21:48:27 -04:00
1 parent 3a8dc5bbc8
commit 2ceda20f0a
1 file changed
+2 -2
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drivers/scsi/scsi_lib.c
+2 -2
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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);