Commit c4853efe authored Oct 21, 2011 by Mike Miller Committed by Jens Axboe Oct 21, 2011

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>

parent ab5dbebe

drivers/scsi/hpsa.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}