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tcm_loop: Set residual field for SCSI commands
If the target core signals an over- or under-run, tcm_loop should call scsi_set_resid() to tell the SCSI midlayer about the residual data length. The difference can be seen by doing something like strace -eioctl sg_raw -r 1024 /dev/sda 8 0 0 0 1 0 > /dev/null and looking at the "resid=" part of the SG_IO ioctl -- after this patch, the field is correctly reported as 512. Signed-off-by: Roland Dreier <roland@purestorage.com> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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@ -829,6 +829,9 @@ static int tcm_loop_queue_data_in(struct se_cmd *se_cmd)
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sc->result = SAM_STAT_GOOD;
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set_host_byte(sc, DID_OK);
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if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) ||
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(se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT))
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scsi_set_resid(sc, se_cmd->residual_count);
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sc->scsi_done(sc);
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return 0;
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}
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@ -854,6 +857,9 @@ static int tcm_loop_queue_status(struct se_cmd *se_cmd)
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sc->result = se_cmd->scsi_status;
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set_host_byte(sc, DID_OK);
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if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) ||
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(se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT))
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scsi_set_resid(sc, se_cmd->residual_count);
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sc->scsi_done(sc);
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return 0;
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}
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