diff options
author | Mike Miller <mike.miller@hp.com> | 2011-10-21 02:19:43 -0400 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2011-10-21 02:21:50 -0400 |
commit | c4853efec665134b2e6fc9c13447323240980351 (patch) | |
tree | 375b2ebcdec0e7f6e9f8321716389181611fc720 /drivers/scsi/hpsa.c | |
parent | ab5dbebe33e0c353e8545f09c34553ac3351dad6 (diff) |
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.c | 7 |
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, | |||
3283 | pmcsr &= ~PCI_PM_CTRL_STATE_MASK; | 3283 | pmcsr &= ~PCI_PM_CTRL_STATE_MASK; |
3284 | pmcsr |= PCI_D0; | 3284 | pmcsr |= PCI_D0; |
3285 | pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); | 3285 | pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); |
3286 | |||
3287 | /* | ||
3288 | * The P600 requires a small delay when changing states. | ||
3289 | * Otherwise we may think the board did not reset and we bail. | ||
3290 | * This for kdump only and is particular to the P600. | ||
3291 | */ | ||
3292 | msleep(500); | ||
3286 | } | 3293 | } |
3287 | return 0; | 3294 | return 0; |
3288 | } | 3295 | } |