diff options
| -rw-r--r-- | drivers/scsi/libata-core.c | 4 | ||||
| -rw-r--r-- | include/linux/libata.h | 19 |
2 files changed, 19 insertions, 4 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 966abb5f423..1c34c1427aa 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1001,7 +1001,7 @@ unsigned ata_exec_internal(struct ata_device *dev, if (test_and_set_bit(tag, &ap->qactive)) BUG(); - qc = ata_qc_from_tag(ap, tag); + qc = __ata_qc_from_tag(ap, tag); qc->tag = tag; qc->scsicmd = NULL; @@ -4042,7 +4042,7 @@ static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) /* the last tag is reserved for internal command. */ for (i = 0; i < ATA_MAX_QUEUE - 1; i++) if (!test_and_set_bit(i, &ap->qactive)) { - qc = ata_qc_from_tag(ap, i); + qc = __ata_qc_from_tag(ap, i); break; } diff --git a/include/linux/libata.h b/include/linux/libata.h index 5a403e434ff..bfcefdca061 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -832,14 +832,29 @@ static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) qc->tf.ctl |= ATA_NIEN; } -static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, - unsigned int tag) +static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, + unsigned int tag) { if (likely(ata_tag_valid(tag))) return &ap->qcmd[tag]; return NULL; } +static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, + unsigned int tag) +{ + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (unlikely(!qc) || !ap->ops->error_handler) + return qc; + + if ((qc->flags & (ATA_QCFLAG_ACTIVE | + ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) + return qc; + + return NULL; +} + static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) { memset(tf, 0, sizeof(*tf)); |