diff options
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b666f51da7e..376dbd80cc9 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1390,6 +1390,7 @@ unsigned ata_exec_internal_sg(struct ata_device *dev, struct ata_queued_cmd *qc; unsigned int tag, preempted_tag; u32 preempted_sactive, preempted_qc_active; + int preempted_nr_active_links; DECLARE_COMPLETION_ONSTACK(wait); unsigned long flags; unsigned int err_mask; @@ -1428,9 +1429,11 @@ unsigned ata_exec_internal_sg(struct ata_device *dev, preempted_tag = link->active_tag; preempted_sactive = link->sactive; preempted_qc_active = ap->qc_active; + preempted_nr_active_links = ap->nr_active_links; link->active_tag = ATA_TAG_POISON; link->sactive = 0; ap->qc_active = 0; + ap->nr_active_links = 0; /* prepare & issue qc */ qc->tf = *tf; @@ -1509,6 +1512,7 @@ unsigned ata_exec_internal_sg(struct ata_device *dev, link->active_tag = preempted_tag; link->sactive = preempted_sactive; ap->qc_active = preempted_qc_active; + ap->nr_active_links = preempted_nr_active_links; /* XXX - Some LLDDs (sata_mv) disable port on command failure. * Until those drivers are fixed, we detect the condition @@ -5408,10 +5412,19 @@ void __ata_qc_complete(struct ata_queued_cmd *qc) ata_sg_clean(qc); /* command should be marked inactive atomically with qc completion */ - if (qc->tf.protocol == ATA_PROT_NCQ) + if (qc->tf.protocol == ATA_PROT_NCQ) { link->sactive &= ~(1 << qc->tag); - else + if (!link->sactive) + ap->nr_active_links--; + } else { link->active_tag = ATA_TAG_POISON; + ap->nr_active_links--; + } + + /* clear exclusive status */ + if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && + ap->excl_link == link)) + ap->excl_link = NULL; /* atapi: mark qc as inactive to prevent the interrupt handler * from completing the command twice later, before the error handler @@ -5590,9 +5603,14 @@ void ata_qc_issue(struct ata_queued_cmd *qc) if (qc->tf.protocol == ATA_PROT_NCQ) { WARN_ON(link->sactive & (1 << qc->tag)); + + if (!link->sactive) + ap->nr_active_links++; link->sactive |= 1 << qc->tag; } else { WARN_ON(link->sactive); + + ap->nr_active_links++; link->active_tag = qc->tag; } |