[SCSI] ipr: Reset device cleanup

Encapsulate some more of the device reset processing in
preparation for SATA support.

Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 41 insertions, 17 deletions

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 695799699131..8b80e59c8c52 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -3281,6 +3281,44 @@ static int ipr_eh_host_reset(struct scsi_cmnd * cmd)
 }
 
 /**
+ * ipr_device_reset - Reset the device
+ * @ioa_cfg:    ioa config struct
+ * @res:                resource entry struct
+ *
+ * This function issues a device reset to the affected device.
+ * If the device is a SCSI device, a LUN reset will be sent
+ * to the device first. If that does not work, a target reset
+ * will be sent.
+ *
+ * Return value:
+ *      0 on success / non-zero on failure
+ **/
+static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg,
+                            struct ipr_resource_entry *res)
+{
+        struct ipr_cmnd *ipr_cmd;
+        struct ipr_ioarcb *ioarcb;
+        struct ipr_cmd_pkt *cmd_pkt;
+        u32 ioasc;
+
+        ENTER;
+        ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
+        ioarcb = &ipr_cmd->ioarcb;
+        cmd_pkt = &ioarcb->cmd_pkt;
+
+        ioarcb->res_handle = res->cfgte.res_handle;
+        cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
+        cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
+
+        ipr_send_blocking_cmd(ipr_cmd, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
+        ioasc = be32_to_cpu(ipr_cmd->ioasa.ioasc);
+        list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
+
+        LEAVE;
+        return (IPR_IOASC_SENSE_KEY(ioasc) ? -EIO : 0);
+}
+
+/**
  * ipr_eh_dev_reset - Reset the device
  * @scsi_cmd:   scsi command struct
  *
@@ -3296,8 +3334,7 @@ static int __ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd)
         struct ipr_cmnd *ipr_cmd;
         struct ipr_ioa_cfg *ioa_cfg;
         struct ipr_resource_entry *res;
-        struct ipr_cmd_pkt *cmd_pkt;
-        u32 ioasc;
+        int rc;
 
         ENTER;
         ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
@@ -3324,25 +3361,12 @@ static int __ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd)
         }
 
         res->resetting_device = 1;
-
-        ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
-
-        ipr_cmd->ioarcb.res_handle = res->cfgte.res_handle;
-        cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
-        cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
-        cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
-
         scmd_printk(KERN_ERR, scsi_cmd, "Resetting device\n");
-        ipr_send_blocking_cmd(ipr_cmd, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
-
-        ioasc = be32_to_cpu(ipr_cmd->ioasa.ioasc);
-
+        rc = ipr_device_reset(ioa_cfg, res);
         res->resetting_device = 0;
 
-        list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
-
         LEAVE;
-        return (IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS);
+        return (rc ? FAILED : SUCCESS);
 }
 
 static int ipr_eh_dev_reset(struct scsi_cmnd * cmd)