cciss: factor out cciss_reset_devices()

cciss: factor out cciss_reset_devices()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

2 files changed, 34 insertions, 20 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 3cd8397f82bd..f49dcd734d1b 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4486,6 +4486,34 @@ static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
         return 0;
 }
 
+static __devinit int cciss_init_reset_devices(struct pci_dev *pdev)
+{
+        int i;
+
+        if (!reset_devices)
+                return 0;
+
+        /* Reset the controller with a PCI power-cycle */
+        if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
+                return -ENODEV;
+
+        /* Some devices (notably the HP Smart Array 5i Controller)
+           need a little pause here */
+        msleep(CCISS_POST_RESET_PAUSE_MSECS);
+
+        /* Now try to get the controller to respond to a no-op */
+        for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
+                if (cciss_noop(pdev) == 0)
+                        break;
+                else
+                        dev_warn(&pdev->dev, "no-op failed%s\n",
+                                (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ?
+                                        "; re-trying" : ""));
+                msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS);
+        }
+        return 0;
+}
+
 /*
  *  This is it.  Find all the controllers and register them.  I really hate
  *  stealing all these major device numbers.
@@ -4501,26 +4529,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
         int dac, return_code;
         InquiryData_struct *inq_buff;
 
-        if (reset_devices) {
-                /* Reset the controller with a PCI power-cycle */
-                if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
-                        return -ENODEV;
-
-                /* Now try to get the controller to respond to a no-op. Some
-                   devices (notably the HP Smart Array 5i Controller) need
-                   up to 30 seconds to respond. */
-                for (i=0; i<30; i++) {
-                        if (cciss_noop(pdev) == 0)
-                                break;
-
-                        schedule_timeout_uninterruptible(HZ);
-                }
-                if (i == 30) {
-                        printk(KERN_ERR "cciss: controller seems dead\n");
-                        return -EBUSY;
-                }
-        }
-
+        rc = cciss_init_reset_devices(pdev);
+        if (rc)
+                return rc;
         i = alloc_cciss_hba();
         if (i < 0)
                 return -1;
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index c2ef9dd56c45..4290b7f0f639 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -204,6 +204,9 @@ struct ctlr_info
 #define CCISS_BOARD_READY_ITERATIONS \
         ((CCISS_BOARD_READY_WAIT_SECS * 1000) / \
                 CCISS_BOARD_READY_POLL_INTERVAL_MSECS)
+#define CCISS_POST_RESET_PAUSE_MSECS (3000)
+#define CCISS_POST_RESET_NOOP_INTERVAL_MSECS (1000)
+#define CCISS_POST_RESET_NOOP_RETRIES (12)
 
 /* 
         Send the command to the hardware