cciss: shorten 30s timeout on controller reset

If reset_devices is set for kexec, then cciss will delay 30 seconds
since the old 5i controller _may_ need that long to recover. Replace
the long sleep with incremental sleep and tests to reduce the 30 seconds
to worst case for 5i, so that other controllers will proceed quickly.

Reviewed-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index d2cb67b61176..b5a061114630 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3611,11 +3611,15 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
                 schedule_timeout_uninterruptible(30*HZ);
 
                 /* Now try to get the controller to respond to a no-op */
-                for (i=0; i<12; i++) {
+                for (i=0; i<30; i++) {
                         if (cciss_noop(pdev) == 0)
                                 break;
-                        else
-                                printk("cciss: no-op failed%s\n", (i < 11 ? "; re-trying" : ""));
+
+                        schedule_timeout_uninterruptible(HZ);
+                }
+                if (i == 30) {
+                        printk(KERN_ERR "cciss: controller seems dead\n");
+                        return -EBUSY;
                 }
         }