From 0447f4d5654bb5d95008f16dad839104f8d0d39a Mon Sep 17 00:00:00 2001 From: Mike Miller Date: Fri, 21 Oct 2011 08:19:43 +0200 Subject: [PATCH] hpsa: add small delay when using PCI Power Management to reset for kump commit c4853efec665134b2e6fc9c13447323240980351 upstream. 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 Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/hpsa.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 78c2e20b2025..6689d5d4d40a 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -3300,6 +3300,13 @@ 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; } -- 2.39.2