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block: add blk_rq_set_block_pc()

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With the optimizations around not clearing the full request at alloc
time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC
up to the user allocating the request.

Add a blk_rq_set_block_pc() that sets the command type to
REQ_TYPE_BLOCK_PC, and properly initializes the members associated
with this type of request. Update callers to use this function instead
of manipulating rq->cmd_type directly.

Includes fixes from Christoph Hellwig <[email protected]> for my half-assed
attempt.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2014-06-06 07:57:37 -06:00
commit f27b087b81
17 changed files with 41 additions and 20 deletions
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3
drivers/target/target_core_pscsi.c
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@ -1055,6 +1055,8 @@ pscsi_execute_cmd(struct se_cmd *cmd)
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
goto fail;
}
blk_rq_set_block_pc(req);
} else {
BUG_ON(!cmd->data_length);
@ -1071,7 +1073,6 @@ pscsi_execute_cmd(struct se_cmd *cmd)
}
}
req->cmd_type = REQ_TYPE_BLOCK_PC;
req->end_io = pscsi_req_done;
req->end_io_data = cmd;
req->cmd_len = scsi_command_size(pt->pscsi_cdb);