From: Mike Miller Date: Fri, 21 Oct 2011 06:19:43 +0000 (+0200) Subject: hpsa: add small delay when using PCI Power Management to reset for kump X-Git-Tag: next-20111025~48^2~1^2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c4853efec665134b2e6fc9c13447323240980351;p=karo-tx-linux.git 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 Cc: stable@kernel.org Signed-off-by: Jens Axboe --- 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; }