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[PATCH] libata: fix ata_qc_issue() error handling 

When ata_qc_issue() fails, the qc might have been dma mapped or not.
So, performing only ata_qc_free() results in dma map leak.  This patch
makes ata_qc_issue() mark dma map flags correctly on failure and calls
ata_qc_complete() after ata_qc_issue() fails.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Tejun Heo 2006-01-23 13:09:36 +09:00 committed by Jeff Garzik
parent 77853bf2b4
commit 8e436af932
2 changed files with 12 additions and 12 deletions
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18
drivers/scsi/libata-core.c
View File

@ -1125,8 +1125,10 @@ ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
qc->private_data = &wait;
qc->complete_fn = ata_qc_complete_internal;
if (ata_qc_issue(qc))
goto issue_fail;
if (ata_qc_issue(qc)) {
qc->err_mask = AC_ERR_OTHER;
ata_qc_complete(qc);
}
spin_unlock_irqrestore(&ap->host_set->lock, flags);
@ -1155,11 +1157,6 @@ ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
ata_qc_free(qc);
return err_mask;
issue_fail:
ata_qc_free(qc);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
return AC_ERR_OTHER;
}
/**
@ -3687,10 +3684,10 @@ int ata_qc_issue(struct ata_queued_cmd *qc)
if (ata_should_dma_map(qc)) {
if (qc->flags & ATA_QCFLAG_SG) {
if (ata_sg_setup(qc))
goto err_out;
goto sg_err;
} else if (qc->flags & ATA_QCFLAG_SINGLE) {
if (ata_sg_setup_one(qc))
goto err_out;
goto sg_err;
}
} else {
qc->flags &= ~ATA_QCFLAG_DMAMAP;
@ -3703,7 +3700,8 @@ int ata_qc_issue(struct ata_queued_cmd *qc)
return ap->ops->qc_issue(qc);
err_out:
sg_err:
qc->flags &= ~ATA_QCFLAG_DMAMAP;
return -1;
}

6
drivers/scsi/libata-scsi.c
View File

@ -1322,8 +1322,10 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
goto early_finish;
/* select device, send command to hardware */
if (ata_qc_issue(qc))
goto err_did;
if (ata_qc_issue(qc)) {
qc->err_mask |= AC_ERR_OTHER;
ata_qc_complete(qc);
}
VPRINTK("EXIT\n");
return;