diff options
| author | Tejun Heo <tj@kernel.org> | 2009-01-09 19:19:14 +0900 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-09 11:54:22 -0800 |
| commit | efcb3cf7f00c3c424db012380a8a974c2676a3c8 (patch) | |
| tree | eaff0a3d6fed469629b81e8781ac80ca7c75eec1 /drivers/ata/libata-core.c | |
| parent | 43529c97122f2c851126447963eedcb8cba74fbe (diff) | |
| download | linux-efcb3cf7f00c3c424db012380a8a974c2676a3c8.tar.bz2 | |
libata: use WARN_ON_ONCE on hot paths
Convert WARN_ON() on command issue/completion paths to WARN_ON_ONCE()
so that libata doesn't spam the machine even when one of those
conditions triggers repeatedly.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 175df54eb664..c507a9ac78f4 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4556,7 +4556,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc) struct scatterlist *sg = qc->sg; int dir = qc->dma_dir; - WARN_ON(sg == NULL); + WARN_ON_ONCE(sg == NULL); VPRINTK("unmapping %u sg elements\n", qc->n_elem); @@ -4776,7 +4776,7 @@ void ata_qc_free(struct ata_queued_cmd *qc) struct ata_port *ap = qc->ap; unsigned int tag; - WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ + WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ qc->flags = 0; tag = qc->tag; @@ -4791,8 +4791,8 @@ void __ata_qc_complete(struct ata_queued_cmd *qc) struct ata_port *ap = qc->ap; struct ata_link *link = qc->dev->link; - WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ - WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); + WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ + WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) ata_sg_clean(qc); @@ -4878,7 +4878,7 @@ void ata_qc_complete(struct ata_queued_cmd *qc) struct ata_device *dev = qc->dev; struct ata_eh_info *ehi = &dev->link->eh_info; - WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); + WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); if (unlikely(qc->err_mask)) qc->flags |= ATA_QCFLAG_FAILED; @@ -5000,16 +5000,16 @@ void ata_qc_issue(struct ata_queued_cmd *qc) * check is skipped for old EH because it reuses active qc to * request ATAPI sense. */ - WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); + WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); if (ata_is_ncq(prot)) { - WARN_ON(link->sactive & (1 << qc->tag)); + WARN_ON_ONCE(link->sactive & (1 << qc->tag)); if (!link->sactive) ap->nr_active_links++; link->sactive |= 1 << qc->tag; } else { - WARN_ON(link->sactive); + WARN_ON_ONCE(link->sactive); ap->nr_active_links++; link->active_tag = qc->tag; |