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[PATCH] libata: make ata_qc_issue complete failed qcs

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There is no reason for the issuer to diddle with a failed qc as the
issuer has complete control over when a qc gets freed (usually in
->complete_fn).  Make ata_qc_issue() responsible for completing qcs
which failed to issue.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-03-31 20:41:11 +09:00 committed by Jeff Garzik
parent e4a70e76ad
commit 8e0e694a3a
3 changed files with 12 additions and 18 deletions
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20
drivers/scsi/libata-core.c
View file

@ -989,9 +989,7 @@ ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
qc->private_data = &wait;
qc->complete_fn = ata_qc_complete_internal;
qc->err_mask = ata_qc_issue(qc);
if (qc->err_mask)
ata_qc_complete(qc);
ata_qc_issue(qc);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
@ -3997,12 +3995,8 @@ static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
* Zero on success, AC_ERR_* mask on failure
*/
unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
void ata_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
@ -4023,14 +4017,18 @@ unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
ap->ops->qc_prep(qc);
return ap->ops->qc_issue(qc);
qc->err_mask |= ap->ops->qc_issue(qc);
if (unlikely(qc->err_mask))
goto err;
return;
sg_err:
qc->flags &= ~ATA_QCFLAG_DMAMAP;
return AC_ERR_SYSTEM;
qc->err_mask |= AC_ERR_SYSTEM;
err:
ata_qc_complete(qc);
}
/**
* ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
* @qc: command to issue to device

8
drivers/scsi/libata-scsi.c
View file

@ -1431,9 +1431,7 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
goto early_finish;
/* select device, send command to hardware */
qc->err_mask = ata_qc_issue(qc);
if (qc->err_mask)
ata_qc_complete(qc);
ata_qc_issue(qc);
VPRINTK("EXIT\n");
return;
@ -2199,9 +2197,7 @@ static void atapi_request_sense(struct ata_queued_cmd *qc)
qc->complete_fn = atapi_sense_complete;
qc->err_mask = ata_qc_issue(qc);
if (qc->err_mask)
ata_qc_complete(qc);
ata_qc_issue(qc);
DPRINTK("EXIT\n");
}

2
drivers/scsi/libata.h
View file

@ -47,7 +47,7 @@ extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
extern int ata_rwcmd_protocol(struct ata_queued_cmd *qc);
extern void ata_port_flush_task(struct ata_port *ap);
extern void ata_qc_free(struct ata_queued_cmd *qc);
extern unsigned int ata_qc_issue(struct ata_queued_cmd *qc);
extern void ata_qc_issue(struct ata_queued_cmd *qc);
extern int ata_check_atapi_dma(struct ata_queued_cmd *qc);
extern void ata_dev_select(struct ata_port *ap, unsigned int device,
unsigned int wait, unsigned int can_sleep);