]> err.no Git - linux-2.6/blobdiff - drivers/scsi/libata-core.c
[libata] Add host lock to struct ata_port
[linux-2.6] / drivers / scsi / libata-core.c
index d73cb3672d6a3a6d7b84ed11b9b743834a83131a..24d340aeb518707f9b29390a92698d38954a30cc 100644 (file)
@@ -933,9 +933,9 @@ void ata_port_flush_task(struct ata_port *ap)
 
        DPRINTK("ENTER\n");
 
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
        ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        DPRINTK("flush #1\n");
        flush_workqueue(ata_wq);
@@ -950,9 +950,9 @@ void ata_port_flush_task(struct ata_port *ap)
                flush_workqueue(ata_wq);
        }
 
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
        ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        DPRINTK("EXIT\n");
 }
@@ -999,11 +999,11 @@ unsigned ata_exec_internal(struct ata_device *dev,
        unsigned int err_mask;
        int rc;
 
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
 
        /* no internal command while frozen */
        if (ap->flags & ATA_FLAG_FROZEN) {
-               spin_unlock_irqrestore(&ap->host_set->lock, flags);
+               spin_unlock_irqrestore(ap->lock, flags);
                return AC_ERR_SYSTEM;
        }
 
@@ -1052,14 +1052,14 @@ unsigned ata_exec_internal(struct ata_device *dev,
 
        ata_qc_issue(qc);
 
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        rc = wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL);
 
        ata_port_flush_task(ap);
 
        if (!rc) {
-               spin_lock_irqsave(&ap->host_set->lock, flags);
+               spin_lock_irqsave(ap->lock, flags);
 
                /* We're racing with irq here.  If we lose, the
                 * following test prevents us from completing the qc
@@ -1078,7 +1078,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
                                       "qc timeout (cmd 0x%x)\n", command);
                }
 
-               spin_unlock_irqrestore(&ap->host_set->lock, flags);
+               spin_unlock_irqrestore(ap->lock, flags);
        }
 
        /* do post_internal_cmd */
@@ -1092,7 +1092,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
        }
 
        /* finish up */
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
 
        *tf = qc->result_tf;
        err_mask = qc->err_mask;
@@ -1118,7 +1118,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
                ata_port_probe(ap);
        }
 
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        return err_mask;
 }
@@ -2943,6 +2943,14 @@ static int ata_dma_blacklisted(const struct ata_device *dev)
        unsigned int nlen, rlen;
        int i;
 
+       /* We don't support polling DMA.
+        * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
+        * if the LLDD handles only interrupts in the HSM_ST_LAST state.
+        */
+       if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
+           (dev->flags & ATA_DFLAG_CDB_INTR))
+               return 1;
+
        ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
                          sizeof(model_num));
        ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
@@ -3235,15 +3243,6 @@ int ata_check_atapi_dma(struct ata_queued_cmd *qc)
        if (ap->ops->check_atapi_dma)
                rc = ap->ops->check_atapi_dma(qc);
 
-       /* We don't support polling DMA.
-        * Use PIO if the LLDD handles only interrupts in
-        * the HSM_ST_LAST state and the ATAPI device
-        * generates CDB interrupts.
-        */
-       if ((ap->flags & ATA_FLAG_PIO_POLLING) &&
-           (qc->dev->flags & ATA_DFLAG_CDB_INTR))
-               rc = 1;
-
        return rc;
 }
 /**
@@ -3496,7 +3495,7 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
 
 /**
  *     ata_mmio_data_xfer - Transfer data by MMIO
- *     @dev: device for this I/O
+ *     @adev: device for this I/O
  *     @buf: data buffer
  *     @buflen: buffer length
  *     @write_data: read/write
@@ -3913,7 +3912,7 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
 
        if (ap->ops->error_handler) {
                if (in_wq) {
-                       spin_lock_irqsave(&ap->host_set->lock, flags);
+                       spin_lock_irqsave(ap->lock, flags);
 
                        /* EH might have kicked in while host_set lock
                         * is released.
@@ -3927,7 +3926,7 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
                                        ata_port_freeze(ap);
                        }
 
-                       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                       spin_unlock_irqrestore(ap->lock, flags);
                } else {
                        if (likely(!(qc->err_mask & AC_ERR_HSM)))
                                ata_qc_complete(qc);
@@ -3936,10 +3935,10 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
                }
        } else {
                if (in_wq) {
-                       spin_lock_irqsave(&ap->host_set->lock, flags);
+                       spin_lock_irqsave(ap->lock, flags);
                        ata_irq_on(ap);
                        ata_qc_complete(qc);
-                       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                       spin_unlock_irqrestore(ap->lock, flags);
                } else
                        ata_qc_complete(qc);
        }
@@ -4019,7 +4018,7 @@ fsm_start:
                 * hsm_task_state is changed. Hence, the following locking.
                 */
                if (in_wq)
-                       spin_lock_irqsave(&ap->host_set->lock, flags);
+                       spin_lock_irqsave(ap->lock, flags);
 
                if (qc->tf.protocol == ATA_PROT_PIO) {
                        /* PIO data out protocol.
@@ -4038,7 +4037,7 @@ fsm_start:
                        atapi_send_cdb(ap, qc);
 
                if (in_wq)
-                       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                       spin_unlock_irqrestore(ap->lock, flags);
 
                /* if polling, ata_pio_task() handles the rest.
                 * otherwise, interrupt handler takes over from here.
@@ -4551,7 +4550,7 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
                        break;
                case ATA_PROT_ATAPI_DMA:
                        if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
-                               /* see ata_check_atapi_dma() */
+                               /* see ata_dma_blacklisted() */
                                BUG();
                        break;
                default:
@@ -4990,6 +4989,7 @@ int ata_device_resume(struct ata_device *dev)
        if (ap->flags & ATA_FLAG_SUSPENDED) {
                struct ata_device *failed_dev;
 
+               ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
                ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
 
                ap->flags &= ~ATA_FLAG_SUSPENDED;
@@ -5130,9 +5130,9 @@ void ata_dev_init(struct ata_device *dev)
         * requests which occur asynchronously.  Synchronize using
         * host_set lock.
         */
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
        dev->flags &= ~ATA_DFLAG_INIT_MASK;
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
               sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
@@ -5167,6 +5167,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
        host->unique_id = ata_unique_id++;
        host->max_cmd_len = 12;
 
+       ap->lock = &host_set->lock;
        ap->flags = ATA_FLAG_DISABLED;
        ap->id = host->unique_id;
        ap->host = host;
@@ -5388,7 +5389,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
                        ata_port_probe(ap);
 
                        /* kick EH for boot probing */
-                       spin_lock_irqsave(&ap->host_set->lock, flags);
+                       spin_lock_irqsave(ap->lock, flags);
 
                        ap->eh_info.probe_mask = (1 << ATA_MAX_DEVICES) - 1;
                        ap->eh_info.action |= ATA_EH_SOFTRESET;
@@ -5396,7 +5397,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
                        ap->flags |= ATA_FLAG_LOADING;
                        ata_port_schedule_eh(ap);
 
-                       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                       spin_unlock_irqrestore(ap->lock, flags);
 
                        /* wait for EH to finish */
                        ata_port_wait_eh(ap);
@@ -5460,29 +5461,29 @@ void ata_port_detach(struct ata_port *ap)
                return;
 
        /* tell EH we're leaving & flush EH */
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
        ap->flags |= ATA_FLAG_UNLOADING;
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        ata_port_wait_eh(ap);
 
        /* EH is now guaranteed to see UNLOADING, so no new device
         * will be attached.  Disable all existing devices.
         */
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
 
        for (i = 0; i < ATA_MAX_DEVICES; i++)
                ata_dev_disable(&ap->device[i]);
 
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        /* Final freeze & EH.  All in-flight commands are aborted.  EH
         * will be skipped and retrials will be terminated with bad
         * target.
         */
-       spin_lock_irqsave(&ap->host_set->lock, flags);
+       spin_lock_irqsave(ap->lock, flags);
        ata_port_freeze(ap);    /* won't be thawed */
-       spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       spin_unlock_irqrestore(ap->lock, flags);
 
        ata_port_wait_eh(ap);