From 83123cb11b5a5205233c59357da2c8d9a8dc9d24 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:17 -0500
Subject: [PATCH] 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>
---
drivers/block/cciss.c | 51 ++++++++++++++++++++++++++-----------------
drivers/block/cciss.h | 3 +++
2 files changed, 34 insertions(+), 20 deletions(-)
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 3cd8397f82bdb..f49dcd734d1b4 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 c2ef9dd56c459..4290b7f0f6394 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
--
2.30.2