11 files changed, 109 insertions, 71 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 3df74a08fe2..25a47d7afa2 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -608,7 +608,7 @@ static void ahci_eng_timeout(struct ata_port *ap)
                  * not being called from the SCSI EH.
                  */
                 qc->scsidone = scsi_finish_command;
-                ata_qc_complete(qc, ATA_ERR);
+                ata_qc_complete(qc, AC_ERR_OTHER);
         }
 
         spin_unlock_irqrestore(&host_set->lock, flags);
@@ -637,7 +637,7 @@ static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
         if (status & PORT_IRQ_FATAL) {
                 ahci_intr_error(ap, status);
                 if (qc)
-                        ata_qc_complete(qc, ATA_ERR);
+                        ata_qc_complete(qc, AC_ERR_OTHER);
         }
 
         return 1;
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 0d58f4d3e5c..6cab14965cc 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2750,7 +2750,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
  *      None.  (grabs host lock)
  */
 
-void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+void ata_poll_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
 {
         struct ata_port *ap = qc->ap;
         unsigned long flags;
@@ -2758,7 +2758,7 @@ void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
         spin_lock_irqsave(&ap->host_set->lock, flags);
         ap->flags &= ~ATA_FLAG_NOINTR;
         ata_irq_on(ap);
-        ata_qc_complete(qc, drv_stat);
+        ata_qc_complete(qc, err_mask);
         spin_unlock_irqrestore(&ap->host_set->lock, flags);
 }
 
@@ -2855,7 +2855,7 @@ static int ata_pio_complete (struct ata_port *ap)
 
         ap->hsm_task_state = HSM_ST_IDLE;
 
-        ata_poll_qc_complete(qc, drv_stat);
+        ata_poll_qc_complete(qc, 0);
 
         /* another command may start at this point */
 
@@ -3223,18 +3223,15 @@ static void ata_pio_block(struct ata_port *ap)
 static void ata_pio_error(struct ata_port *ap)
 {
         struct ata_queued_cmd *qc;
-        u8 drv_stat;
+
+        printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
 
         qc = ata_qc_from_tag(ap, ap->active_tag);
         assert(qc != NULL);
 
-        drv_stat = ata_chk_status(ap);
-        printk(KERN_WARNING "ata%u: PIO error, drv_stat 0x%x\n",
-               ap->id, drv_stat);
-
         ap->hsm_task_state = HSM_ST_IDLE;
 
-        ata_poll_qc_complete(qc, drv_stat | ATA_ERR);
+        ata_poll_qc_complete(qc, AC_ERR_ATA_BUS);
 }
 
 static void ata_pio_task(void *_data)
@@ -3357,7 +3354,7 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
                        ap->id, qc->tf.command, drv_stat, host_stat);
 
                 /* complete taskfile transaction */
-                ata_qc_complete(qc, drv_stat);
+                ata_qc_complete(qc, ac_err_mask(drv_stat));
                 break;
         }
 
@@ -3462,7 +3459,7 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
         return qc;
 }
 
-int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat)
+int ata_qc_complete_noop(struct ata_queued_cmd *qc, unsigned int err_mask)
 {
         return 0;
 }
@@ -3521,7 +3518,7 @@ void ata_qc_free(struct ata_queued_cmd *qc)
  *      spin_lock_irqsave(host_set lock)
  */
 
-void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+void ata_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
 {
         int rc;
 
@@ -3538,7 +3535,7 @@ void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
         qc->flags &= ~ATA_QCFLAG_ACTIVE;
 
         /* call completion callback */
-        rc = qc->complete_fn(qc, drv_stat);
+        rc = qc->complete_fn(qc, err_mask);
 
         /* if callback indicates not to complete command (non-zero),
          * return immediately
@@ -3976,7 +3973,7 @@ inline unsigned int ata_host_intr (struct ata_port *ap,
                 ap->ops->irq_clear(ap);
 
                 /* complete taskfile transaction */
-                ata_qc_complete(qc, status);
+                ata_qc_complete(qc, ac_err_mask(status));
                 break;
 
         default:
@@ -4071,7 +4068,7 @@ static void atapi_packet_task(void *_data)
         /* sleep-wait for BSY to clear */
         DPRINTK("busy wait\n");
         if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB))
-                goto err_out;
+                goto err_out_status;
 
         /* make sure DRQ is set */
         status = ata_chk_status(ap);
@@ -4108,8 +4105,10 @@ static void atapi_packet_task(void *_data)
 
         return;
 
+err_out_status:
+        status = ata_chk_status(ap);
 err_out:
-        ata_poll_qc_complete(qc, ATA_ERR);
+        ata_poll_qc_complete(qc, __ac_err_mask(status));
 }
 
 
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 69058510f43..5574520bf1c 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -560,7 +560,7 @@ void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
          * Use ata_to_sense_error() to map status register bits
          * onto sense key, asc & ascq.
          */
-        if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) {
+        if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
                 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
                                    &sb[1], &sb[2], &sb[3]);
                 sb[1] &= 0x0f;
@@ -635,7 +635,7 @@ void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
          * Use ata_to_sense_error() to map status register bits
          * onto sense key, asc & ascq.
          */
-        if (unlikely(tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ))) {
+        if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
                 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
                                    &sb[2], &sb[12], &sb[13]);
                 sb[2] &= 0x0f;
@@ -644,7 +644,11 @@ void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
         sb[0] = 0x70;
         sb[7] = 0x0a;
 
-        if (tf->flags & ATA_TFLAG_LBA && !(tf->flags & ATA_TFLAG_LBA48)) {
+        if (tf->flags & ATA_TFLAG_LBA48) {
+                /* TODO: find solution for LBA48 descriptors */
+        }
+
+        else if (tf->flags & ATA_TFLAG_LBA) {
                 /* A small (28b) LBA will fit in the 32b info field */
                 sb[0] |= 0x80;          /* set valid bit */
                 sb[3] = tf->device & 0x0f;
@@ -652,6 +656,10 @@ void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
                 sb[5] = tf->lbam;
                 sb[6] = tf->lbal;
         }
+
+        else {
+                /* TODO: C/H/S */
+        }
 }
 
 /**
@@ -1209,10 +1217,12 @@ nothing_to_do:
         return 1;
 }
 
-static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+static int ata_scsi_qc_complete(struct ata_queued_cmd *qc,
+                                unsigned int err_mask)
 {
         struct scsi_cmnd *cmd = qc->scsicmd;
-        int need_sense = drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ);
+        u8 *cdb = cmd->cmnd;
+        int need_sense = (err_mask != 0);
 
         /* For ATA pass thru (SAT) commands, generate a sense block if
          * user mandated it or if there's an error.  Note that if we
@@ -1221,8 +1231,8 @@ static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
          * whether the command completed successfully or not. If there
          * was no error, SK, ASC and ASCQ will all be zero.
          */
-        if (((cmd->cmnd[0] == ATA_16) || (cmd->cmnd[0] == ATA_12)) &&
-            ((cmd->cmnd[2] & 0x20) || need_sense)) {
+        if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
+            ((cdb[2] & 0x20) || need_sense)) {
                 ata_gen_ata_desc_sense(qc);
         } else {
                 if (!need_sense) {
@@ -2005,21 +2015,13 @@ void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
         DPRINTK("EXIT\n");
 }
 
-static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+static int atapi_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
 {
         struct scsi_cmnd *cmd = qc->scsicmd;
 
-        VPRINTK("ENTER, drv_stat == 0x%x\n", drv_stat);
-
-        if (unlikely(drv_stat & (ATA_BUSY | ATA_DRQ)))
-                /* FIXME: not quite right; we don't want the
-                 * translation of taskfile registers into
-                 * a sense descriptors, since that's only
-                 * correct for ATA, not ATAPI
-                 */
-                ata_gen_ata_desc_sense(qc);
+        VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
 
-        else if (unlikely(drv_stat & ATA_ERR)) {
+        if (unlikely(err_mask & AC_ERR_DEV)) {
                 DPRINTK("request check condition\n");
 
                 /* FIXME: command completion with check condition
@@ -2036,6 +2038,14 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
                 return 1;
         }
 
+        else if (unlikely(err_mask))
+                /* FIXME: not quite right; we don't want the
+                 * translation of taskfile registers into
+                 * a sense descriptors, since that's only
+                 * correct for ATA, not ATAPI
+                 */
+                ata_gen_ata_desc_sense(qc);
+
         else {
                 u8 *scsicmd = cmd->cmnd;
 
diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h
index 65c264b9113..10ecd9e15e4 100644
--- a/drivers/scsi/libata.h
+++ b/drivers/scsi/libata.h
@@ -39,7 +39,7 @@ struct ata_scsi_args {
 
 /* libata-core.c */
 extern int atapi_enabled;
-extern int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat);
+extern int ata_qc_complete_noop(struct ata_queued_cmd *qc, unsigned int err_mask);
 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
                                       struct ata_device *dev);
 extern void ata_rwcmd_protocol(struct ata_queued_cmd *qc);
diff --git a/drivers/scsi/pdc_adma.c b/drivers/scsi/pdc_adma.c
index 5c0f90677d0..988d0d70a27 100644
--- a/drivers/scsi/pdc_adma.c
+++ b/drivers/scsi/pdc_adma.c
@@ -451,7 +451,7 @@ static inline unsigned int adma_intr_pkt(struct ata_host_set *host_set)
                 struct adma_port_priv *pp;
                 struct ata_queued_cmd *qc;
                 void __iomem *chan = ADMA_REGS(mmio_base, port_no);
-                u8 drv_stat = 0, status = readb(chan + ADMA_STATUS);
+                u8 status = readb(chan + ADMA_STATUS);
 
                 if (status == 0)
                         continue;
@@ -464,11 +464,14 @@ static inline unsigned int adma_intr_pkt(struct ata_host_set *host_set)
                         continue;
                 qc = ata_qc_from_tag(ap, ap->active_tag);
                 if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
+                        unsigned int err_mask = 0;
+
                         if ((status & (aPERR | aPSD | aUIRQ)))
-                                drv_stat = ATA_ERR;
+                                err_mask = AC_ERR_OTHER;
                         else if (pp->pkt[0] != cDONE)
-                                drv_stat = ATA_ERR;
-                        ata_qc_complete(qc, drv_stat);
+                                err_mask = AC_ERR_OTHER;
+
+                        ata_qc_complete(qc, err_mask);
                 }
         }
         return handled;
@@ -498,7 +501,7 @@ static inline unsigned int adma_intr_mmio(struct ata_host_set *host_set)
                 
                                 /* complete taskfile transaction */
                                 pp->state = adma_state_idle;
-                                ata_qc_complete(qc, status);
+                                ata_qc_complete(qc, ac_err_mask(status));
                                 handled = 1;
                         }
                 }
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index ad4808ef71d..a3ab14c79cd 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -1066,6 +1066,7 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
         struct ata_queued_cmd *qc;
         u32 hc_irq_cause;
         int shift, port, port0, hard_port, handled;
+        unsigned int err_mask;
         u8 ata_status = 0;
 
         if (hc == 0) {
@@ -1101,15 +1102,15 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
                         handled++;
                 }
 
+                err_mask = ac_err_mask(ata_status);
+
                 shift = port << 1;              /* (port * 2) */
                 if (port >= MV_PORTS_PER_HC) {
                         shift++;        /* skip bit 8 in the HC Main IRQ reg */
                 }
                 if ((PORT0_ERR << shift) & relevant) {
                         mv_err_intr(ap);
-                        /* OR in ATA_ERR to ensure libata knows we took one */
-                        ata_status = readb((void __iomem *)
-                                           ap->ioaddr.status_addr) | ATA_ERR;
+                        err_mask |= AC_ERR_OTHER;
                         handled++;
                 }
                 
@@ -1119,7 +1120,7 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
                                 VPRINTK("port %u IRQ found for qc, "
                                         "ata_status 0x%x\n", port,ata_status);
                                 /* mark qc status appropriately */
-                                ata_qc_complete(qc, ata_status);
+                                ata_qc_complete(qc, err_mask);
                         }
                 }
         }
@@ -1295,7 +1296,7 @@ static void mv_eng_timeout(struct ata_port *ap)
                  */
                 spin_lock_irqsave(&ap->host_set->lock, flags);
                 qc->scsidone = scsi_finish_command;
-                ata_qc_complete(qc, ATA_ERR);
+                ata_qc_complete(qc, AC_ERR_OTHER);
                 spin_unlock_irqrestore(&ap->host_set->lock, flags);
         }
 }
diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c
index 63911f16b6e..8f41702275d 100644
--- a/drivers/scsi/sata_promise.c
+++ b/drivers/scsi/sata_promise.c
@@ -399,7 +399,8 @@ static void pdc_eng_timeout(struct ata_port *ap)
         case ATA_PROT_DMA:
         case ATA_PROT_NODATA:
                 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
-                ata_qc_complete(qc, ata_wait_idle(ap) | ATA_ERR);
+                drv_stat = ata_wait_idle(ap);
+                ata_qc_complete(qc, __ac_err_mask(drv_stat));
                 break;
 
         default:
@@ -408,7 +409,7 @@ static void pdc_eng_timeout(struct ata_port *ap)
                 printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n",
                        ap->id, qc->tf.command, drv_stat);
 
-                ata_qc_complete(qc, drv_stat);
+                ata_qc_complete(qc, ac_err_mask(drv_stat));
                 break;
         }
 
@@ -420,24 +421,21 @@ out:
 static inline unsigned int pdc_host_intr( struct ata_port *ap,
                                           struct ata_queued_cmd *qc)
 {
-        u8 status;
-        unsigned int handled = 0, have_err = 0;
+        unsigned int handled = 0, err_mask = 0;
         u32 tmp;
         void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_GLOBAL_CTL;
 
         tmp = readl(mmio);
         if (tmp & PDC_ERR_MASK) {
-                have_err = 1;
+                err_mask = AC_ERR_DEV;
                 pdc_reset_port(ap);
         }
 
         switch (qc->tf.protocol) {
         case ATA_PROT_DMA:
         case ATA_PROT_NODATA:
-                status = ata_wait_idle(ap);
-                if (have_err)
-                        status |= ATA_ERR;
-                ata_qc_complete(qc, status);
+                err_mask |= ac_err_mask(ata_wait_idle(ap));
+                ata_qc_complete(qc, err_mask);
                 handled = 1;
                 break;
 
diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c
index f2c599f08fa..8c20229b01b 100644
--- a/drivers/scsi/sata_qstor.c
+++ b/drivers/scsi/sata_qstor.c
@@ -402,11 +402,12 @@ static inline unsigned int qs_intr_pkt(struct ata_host_set *host_set)
                                 qc = ata_qc_from_tag(ap, ap->active_tag);
                                 if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
                                         switch (sHST) {
-                                        case 0: /* sucessful CPB */
+                                        case 0: /* successful CPB */
                                         case 3: /* device error */
                                                 pp->state = qs_state_idle;
                                                 qs_enter_reg_mode(qc->ap);
-                                                ata_qc_complete(qc, sDST);
+                                                ata_qc_complete(qc,
+                                                        ac_err_mask(sDST));
                                                 break;
                                         default:
                                                 break;
@@ -443,7 +444,7 @@ static inline unsigned int qs_intr_mmio(struct ata_host_set *host_set)
 
                                 /* complete taskfile transaction */
                                 pp->state = qs_state_idle;
-                                ata_qc_complete(qc, status);
+                                ata_qc_complete(qc, ac_err_mask(status));
                                 handled = 1;
                         }
                 }
diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 7e6e5c049b7..05ce84286ae 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -503,7 +503,7 @@ static void sil24_eng_timeout(struct ata_port *ap)
 
         qc = ata_qc_from_tag(ap, ap->active_tag);
         if (!qc) {
-                printk(KERN_ERR "ata%u: BUG: tiemout without command\n",
+                printk(KERN_ERR "ata%u: BUG: timeout without command\n",
                        ap->id);
                 return;
         }
@@ -517,7 +517,7 @@ static void sil24_eng_timeout(struct ata_port *ap)
          */
         printk(KERN_ERR "ata%u: command timeout\n", ap->id);
         qc->scsidone = scsi_finish_command;
-        ata_qc_complete(qc, ATA_ERR);
+        ata_qc_complete(qc, AC_ERR_OTHER);
 
         sil24_reset_controller(ap);
 }
@@ -528,6 +528,7 @@ static void sil24_error_intr(struct ata_port *ap, u32 slot_stat)
         struct sil24_port_priv *pp = ap->private_data;
         void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
         u32 irq_stat, cmd_err, sstatus, serror;
+        unsigned int err_mask;
 
         irq_stat = readl(port + PORT_IRQ_STAT);
         writel(irq_stat, port + PORT_IRQ_STAT);         /* clear irq */
@@ -555,17 +556,18 @@ static void sil24_error_intr(struct ata_port *ap, u32 slot_stat)
                  * Device is reporting error, tf registers are valid.
                  */
                 sil24_update_tf(ap);
+                err_mask = ac_err_mask(pp->tf.command);
         } else {
                 /*
                  * Other errors.  libata currently doesn't have any
                  * mechanism to report these errors.  Just turn on
                  * ATA_ERR.
                  */
-                pp->tf.command = ATA_ERR;
+                err_mask = AC_ERR_OTHER;
         }
 
         if (qc)
-                ata_qc_complete(qc, pp->tf.command);
+                ata_qc_complete(qc, err_mask);
 
         sil24_reset_controller(ap);
 }
@@ -590,7 +592,7 @@ static inline void sil24_host_intr(struct ata_port *ap)
                 sil24_update_tf(ap);
 
                 if (qc)
-                        ata_qc_complete(qc, pp->tf.command);
+                        ata_qc_complete(qc, ac_err_mask(pp->tf.command));
         } else
                 sil24_error_intr(ap, slot_stat);
 }
diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c
index 8710d0f14f9..8e2e7b8308c 100644
--- a/drivers/scsi/sata_sx4.c
+++ b/drivers/scsi/sata_sx4.c
@@ -717,7 +717,7 @@ static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
                         VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->id,
                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
                         /* get drive status; clear intr; complete txn */
-                        ata_qc_complete(qc, ata_wait_idle(ap));
+                        ata_qc_complete(qc, ac_err_mask(ata_wait_idle(ap)));
                         pdc20621_pop_hdma(qc);
                 }
 
@@ -755,7 +755,7 @@ static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
                         VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->id,
                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
                         /* get drive status; clear intr; complete txn */
-                        ata_qc_complete(qc, ata_wait_idle(ap));
+                        ata_qc_complete(qc, ac_err_mask(ata_wait_idle(ap)));
                         pdc20621_pop_hdma(qc);
                 }
                 handled = 1;
@@ -765,7 +765,7 @@ static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
 
                 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
                 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
-                ata_qc_complete(qc, status);
+                ata_qc_complete(qc, ac_err_mask(status));
                 handled = 1;
 
         } else {
@@ -880,7 +880,7 @@ static void pdc_eng_timeout(struct ata_port *ap)
         case ATA_PROT_DMA:
         case ATA_PROT_NODATA:
                 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
-                ata_qc_complete(qc, ata_wait_idle(ap) | ATA_ERR);
+                ata_qc_complete(qc, __ac_err_mask(ata_wait_idle(ap)));
                 break;
 
         default:
@@ -889,7 +889,7 @@ static void pdc_eng_timeout(struct ata_port *ap)
                 printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n",
                        ap->id, qc->tf.command, drv_stat);
 
-                ata_qc_complete(qc, drv_stat);
+                ata_qc_complete(qc, ac_err_mask(drv_stat));
                 break;
         }
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 364cd11456f..6225b78fa65 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -176,6 +176,13 @@ enum hsm_task_states {
         HSM_ST_ERR,
 };
 
+enum ata_completion_errors {
+        AC_ERR_OTHER            = (1 << 0),
+        AC_ERR_DEV              = (1 << 1),
+        AC_ERR_ATA_BUS          = (1 << 2),
+        AC_ERR_HOST_BUS         = (1 << 3),
+};
+
 /* forward declarations */
 struct scsi_device;
 struct ata_port_operations;
@@ -183,7 +190,7 @@ struct ata_port;
 struct ata_queued_cmd;
 
 /* typedefs */
-typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat);
+typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, unsigned int err_mask);
 
 struct ata_ioports {
         unsigned long           cmd_addr;
@@ -465,7 +472,7 @@ extern void ata_bmdma_start (struct ata_queued_cmd *qc);
 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
 extern u8   ata_bmdma_status(struct ata_port *ap);
 extern void ata_bmdma_irq_clear(struct ata_port *ap);
-extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat);
+extern void ata_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask);
 extern void ata_eng_timeout(struct ata_port *ap);
 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
                               void (*done)(struct scsi_cmnd *));
@@ -753,4 +760,21 @@ static inline int ata_try_flush_cache(const struct ata_device *dev)
                ata_id_has_flush_ext(dev->id);
 }
 
+static inline unsigned int ac_err_mask(u8 status)
+{
+        if (status & ATA_BUSY)
+                return AC_ERR_ATA_BUS;
+        if (status & (ATA_ERR | ATA_DF))
+                return AC_ERR_DEV;
+        return 0;
+}
+
+static inline unsigned int __ac_err_mask(u8 status)
+{
+        unsigned int mask = ac_err_mask(status);
+        if (mask == 0)
+                return AC_ERR_OTHER;
+        return mask;
+}
+
 #endif /* __LINUX_LIBATA_H__ */