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authorMike Miller <mike.miller@hp.com>2011-10-21 08:19:43 +0200
committerJens Axboe <axboe@kernel.dk>2011-10-21 08:21:50 +0200
commitc4853efec665134b2e6fc9c13447323240980351 (patch)
tree375b2ebcdec0e7f6e9f8321716389181611fc720 /drivers/scsi/hpsa.c
parentab5dbebe33e0c353e8545f09c34553ac3351dad6 (diff)
downloadlinux-c4853efec665134b2e6fc9c13447323240980351.tar.gz
hpsa: add small delay when using PCI Power Management to reset for kump
The P600 requires a small delay when changing states. Otherwise we may think
the board did not reset and we bail. This for kdump only and is particular
to the P600.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/scsi/hpsa.c')
-rw-r--r--drivers/scsi/hpsa.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index ec61bdb833ac..381929813cbd 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3283,6 +3283,13 @@ static int hpsa_controller_hard_reset(struct pci_dev *pdev,
 		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
 		pmcsr |= PCI_D0;
 		pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
+
+		/*
+		 * The P600 requires a small delay when changing states.
+		 * Otherwise we may think the board did not reset and we bail.
+		 * This for kdump only and is particular to the P600.
+		 */
+		msleep(500);
 	}
 	return 0;
 }