cciss: factor out cciss_wait_for_board_ready()

cciss: factor out cciss_wait_for_board_ready()

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

2 files changed, 32 insertions, 15 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 9c9c79c0aa98..286c81d70818 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4026,9 +4026,23 @@ static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
         return -ENODEV;
 }
 
+static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
+{
+        int i;
+        u32 scratchpad;
+
+        for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) {
+                scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
+                if (scratchpad == CCISS_FIRMWARE_READY)
+                        return 0;
+                msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
+        }
+        dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
+        return -ENODEV;
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
-        __u32 scratchpad = 0;
         __u64 cfg_offset;
         __u32 cfg_base_addr;
         __u64 cfg_base_addr_index;
@@ -4073,21 +4087,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
         if (err)
                 goto err_out_free_res;
         c->vaddr = remap_pci_mem(c->paddr, 0x250);
-
-        /* Wait for the board to become ready.  (PCI hotplug needs this.)
-         * We poll for up to 120 secs, once per 100ms. */
-        for (i = 0; i < 1200; i++) {
-                scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
-                if (scratchpad == CCISS_FIRMWARE_READY)
-                        break;
-                set_current_state(TASK_INTERRUPTIBLE);
-                schedule_timeout(msecs_to_jiffies(100));        /* wait 100ms */
-        }
-        if (scratchpad != CCISS_FIRMWARE_READY) {
-                printk(KERN_WARNING "cciss: Board not ready.  Timed out.\n");
-                err = -ENODEV;
+        err = cciss_wait_for_board_ready(c);
+        if (err)
                 goto err_out_free_res;
-        }
 
         /* get the address index number */
         cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 8a9f5b58daa8..c2ef9dd56c45 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -190,6 +190,21 @@ struct ctlr_info
 
 #define CCISS_INTR_ON   1 
 #define CCISS_INTR_OFF  0
+
+
+/* CCISS_BOARD_READY_WAIT_SECS is how long to wait for a board
+ * to become ready, in seconds, before giving up on it.
+ * CCISS_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
+ * between polling the board to see if it is ready, in
+ * milliseconds.  CCISS_BOARD_READY_ITERATIONS is derived
+ * the above.
+ */
+#define CCISS_BOARD_READY_WAIT_SECS (120)
+#define CCISS_BOARD_READY_POLL_INTERVAL_MSECS (100)
+#define CCISS_BOARD_READY_ITERATIONS \
+        ((CCISS_BOARD_READY_WAIT_SECS * 1000) / \
+                CCISS_BOARD_READY_POLL_INTERVAL_MSECS)
+
 /* 
         Send the command to the hardware 
 */