diff options
Diffstat (limited to 'drivers/ata/sata_mv.c')
| -rw-r--r-- | drivers/ata/sata_mv.c | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index a476cd99b95..9463c71dd38 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -2716,34 +2716,35 @@ static void mv_err_intr(struct ata_port *ap) static void mv_process_crpb_response(struct ata_port *ap, struct mv_crpb *response, unsigned int tag, int ncq_enabled) { + u8 ata_status; + u16 edma_status = le16_to_cpu(response->flags); struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); - if (qc) { - u8 ata_status; - u16 edma_status = le16_to_cpu(response->flags); - /* - * edma_status from a response queue entry: - * LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only). - * MSB is saved ATA status from command completion. - */ - if (!ncq_enabled) { - u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV; - if (err_cause) { - /* - * Error will be seen/handled by mv_err_intr(). - * So do nothing at all here. - */ - return; - } - } - ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT; - if (!ac_err_mask(ata_status)) - ata_qc_complete(qc); - /* else: leave it for mv_err_intr() */ - } else { + if (unlikely(!qc)) { ata_port_printk(ap, KERN_ERR, "%s: no qc for tag=%d\n", __func__, tag); + return; + } + + /* + * edma_status from a response queue entry: + * LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only). + * MSB is saved ATA status from command completion. + */ + if (!ncq_enabled) { + u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV; + if (err_cause) { + /* + * Error will be seen/handled by + * mv_err_intr(). So do nothing at all here. + */ + return; + } } + ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT; + if (!ac_err_mask(ata_status)) + ata_qc_complete(qc); + /* else: leave it for mv_err_intr() */ } static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp) |