IB/mthca: Make all device methods truly reentrant

[linux-2.6] / drivers / scsi / libata-scsi.c

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index b7df37ed4393489c055d7f03c5cab37c86225c96..a0289ec3e283bd532c802c05c5cba0958305828a 100644 (file)
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -53,6 +53,7 @@
 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
 static struct ata_device *
 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
+static void ata_scsi_error(struct Scsi_Host *host);
 enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 
 #define RW_RECOVERY_MPAGE 0x1
@@ -99,6 +100,7 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
  * It just needs the eh_timed_out hook.
  */
 struct scsi_transport_template ata_scsi_transport_template = {
+       .eh_strategy_handler    = ata_scsi_error,
        .eh_timed_out           = ata_scsi_timed_out,
 };
 
@@ -267,20 +269,8 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
 
 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
 {
-       struct ata_port *ap;
-       struct ata_device *dev;
        int val = -EINVAL, rc = -EINVAL;
 
-       ap = (struct ata_port *) &scsidev->host->hostdata[0];
-       if (!ap)
-               goto out;
-
-       dev = ata_scsi_find_dev(ap, scsidev);
-       if (!dev) {
-               rc = -ENODEV;
-               goto out;
-       }
-
        switch (cmd) {
        case ATA_IOC_GET_IO32:
                val = 0;
@@ -309,7 +299,6 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
                break;
        }
 
-out:
        return rc;
 }
 
@@ -785,12 +774,9 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
  *
  *     LOCKING:
  *     Inherited from SCSI layer (none, can sleep)
- *
- *     RETURNS:
- *     Zero.
  */
 
-int ata_scsi_error(struct Scsi_Host *host)
+static void ata_scsi_error(struct Scsi_Host *host)
 {
        struct ata_port *ap;
        unsigned long flags;
@@ -818,7 +804,6 @@ int ata_scsi_error(struct Scsi_Host *host)
        spin_unlock_irqrestore(&ap->host_set->lock, flags);
 
        DPRINTK("EXIT\n");
-       return 0;
 }
 
 static void ata_eh_scsidone(struct scsi_cmnd *scmd)
@@ -1444,9 +1429,7 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
                goto early_finish;
 
        /* select device, send command to hardware */
-       qc->err_mask = ata_qc_issue(qc);
-       if (qc->err_mask)
-               ata_qc_complete(qc);
+       ata_qc_issue(qc);
 
        VPRINTK("EXIT\n");
        return;
@@ -2212,9 +2195,7 @@ static void atapi_request_sense(struct ata_queued_cmd *qc)
 
        qc->complete_fn = atapi_sense_complete;
 
-       qc->err_mask = ata_qc_issue(qc);
-       if (qc->err_mask)
-               ata_qc_complete(qc);
+       ata_qc_issue(qc);
 
        DPRINTK("EXIT\n");
 }
@@ -2597,6 +2578,21 @@ static inline void ata_scsi_dump_cdb(struct ata_port *ap,
 #endif
 }
 
+static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
+                                      struct ata_port *ap, struct ata_device *dev)
+{
+       if (dev->class == ATA_DEV_ATA) {
+               ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
+                                                             cmd->cmnd[0]);
+
+               if (xlat_func)
+                       ata_scsi_translate(ap, dev, cmd, done, xlat_func);
+               else
+                       ata_scsi_simulate(ap, dev, cmd, done);
+       } else
+               ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
+}
+
 /**
  *     ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
  *     @cmd: SCSI command to be sent
@@ -2631,24 +2627,13 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
        ata_scsi_dump_cdb(ap, cmd);
 
        dev = ata_scsi_find_dev(ap, scsidev);
-       if (unlikely(!dev)) {
+       if (likely(dev))
+               __ata_scsi_queuecmd(cmd, done, ap, dev);
+       else {
                cmd->result = (DID_BAD_TARGET << 16);
                done(cmd);
-               goto out_unlock;
        }
 
-       if (dev->class == ATA_DEV_ATA) {
-               ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
-                                                             cmd->cmnd[0]);
-
-               if (xlat_func)
-                       ata_scsi_translate(ap, dev, cmd, done, xlat_func);
-               else
-                       ata_scsi_simulate(ap, dev, cmd, done);
-       } else
-               ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
-
-out_unlock:
        spin_unlock(&ap->host_set->lock);
        spin_lock(shost->host_lock);
        return 0;